Most of the time fatigue can be traced to one or more of your habits or routines, particularly lack of exercise. It's also commonly related to depression. On occasion, fatigue is a symptom of other underlying conditions that require medical treatment.

Lifestyle factors

Taking an honest inventory of things that might be responsible for your fatigue is often the first step toward relief. Fatigue may be related to:

  1. Use of alcohol or drugs
  2. Excess physical activity
  3. Jet lag disorder
  4. Lack of physical activity
  5. Lack of sleep
  6. Medications, such as antihistamines, cough medicines
  7. Unhealthy eating habits


Unrelenting exhaustion may be a sign of a condition or an effect of the drugs or therapies used to treat it, such as:

  1. Acute liver failure
  2. Anemia
  3. Anxiety disorders
  4. Cancer
  5. Chronic fatigue syndrome
  6. Chronic infection or inflammation
  7. Chronic kidney disease
  8. Concussion
  9. COPD (chronic obstructive pulmonary disease) exacerbation — worsening of symptoms
  10. Depression (major depressive disorder)
  11. Diabetes
  12. Emphysema
  13. Fibromyalgia
  14. Grief
  15. Heart disease
  16. Hyperthyroidism (overactive thyroid)
  17. Hypothyroidism (underactive thyroid)
  18. Inflammatory bowel disease (IBD)
  19. Medications and treatments, such as chemotherapy, radiation therapy, pain drugs, heart drugs and antidepressants
  20. Multiple sclerosis
  21. Obesity
  22. Pain that's persistent
  23. Sleep apnea
  24. Stress
  25. Traumatic brain injury

Causes shown here are commonly associated with this symptom. Work with your doctor or other health care professional for an accurate diagnosis.

Jan. 11, 2018

See also

  1. 10 signs you might have amyloidosis
  2. 7 signs of endometriosis
  3. Acetyl-L-carnitine: Can it relieve MS fatigue?
  4. Acromegaly
  5. Acute bronchitis: Is it contagious?
  6. Acute hepatitis C infection
  7. Acute kidney failure
  8. Acute lymphocytic leukemia
  9. Acute myelogenous leukemia
  10. Acute sinusitis
  11. Acute sinusitis: Do over-the-counter treatments help?
  12. Addison's disease
  13. Adjuvant therapy for cancer
  14. Adrenal fatigue: What causes it?
  15. Alcoholic hepatitis
  16. Alternative cancer treatments: 10 options to consider
  17. Ambien: Is dependence a concern?
  18. Amputation and diabetes
  19. Amyloidosis
  20. Amyloidosis: Am I at risk?
  21. Amyloidosis: How do I cope?
  22. Anaphylaxis
  23. Anemia
  24. Angina
  25. Anorexia nervosa
  26. Anthrax
  27. Antidepressant withdrawal: Is there such a thing?
  28. Antidepressants and alcohol: What's the concern?
  29. Antidepressants and weight gain: What causes it?
  30. Antidepressants: Can they stop working?
  31. Antidepressants for children and teens
  32. Antidepressants: Side effects
  33. Antidepressants: Selecting one that's right for you
  34. Antidepressants: Which cause the fewest sexual side effects?
  35. Anxiety disorders
  36. Aortic calcification: An early sign of heart valve problems?
  37. Aortic valve regurgitation
  38. Aortic valve stenosis
  39. Aplastic anemia
  40. ARDS
  41. Arteriovenous fistula
  42. Artificial sweeteners: Any effect on blood sugar?
  43. Ascariasis
  44. Aspergillosis
  45. Atrial septal defect
  46. Atrioventricular canal defect
  47. Atypical antidepressants
  48. Atypical cells: Are they cancer?
  49. Autoimmune hepatitis
  50. Automated external defibrillators: Do you need an AED?
  51. Base tan? Bad idea
  52. Bedtime routines: Not just for babies
  53. Biopsy procedures
  54. Bipolar disorder
  55. Bipolar disorder and alcoholism: Are they related?
  56. Bipolar in children
  57. Bipolar medications and weight gain
  58. Bipolar treatment: I vs. II
  59. Blastocystis hominis
  60. Infographic: Blood Cancer Awareness
  61. Blood clots during menstruation: A concern?
  62. Blood glucose meters
  63. Blood glucose monitors
  64. Blood sugar levels can fluctuate for many reasons
  65. Blood sugar testing: Why, when and how
  66. Blood tests for heart disease
  67. Mitral valve clip to treat mitral regurgitation: Bob's story
  68. Bone and joint problems associated with diabetes
  69. Bone cancer
  70. Bradycardia
  71. Mitral valve overview
  72. Explaining multiple sclerosis
  73. 4 Ways to Prevent Heart Attack
  74. Ebstein Anomaly
  75. Ebstein Anomaly Part Two: Patient Frequently Asked Questions
  76. Fact or Fiction? Debunking Exercise & Nutrition Myths for Preventing Heart Disease and Risk Factors
  77. Giant Cell Myocarditis
  78. Healthy Heart Numbers
  79. Heart disease in women
  80. Heart Failure
  81. How kidneys work
  82. Is swimming a trigger for a Long QT Syndrome episode?
  83. Jack Long — Live Long, Beat Strong to Find a Cure
  84. Video: Leaky Valve Animation
  85. Leaky Valve Cone Procedure
  86. Mayo Clinic - Holiday Heart Attack and Stroke Risk
  87. Parathyroid
  88. Pulmonary hypertension overview
  89. Pulmonary Hypertension Treatment and Research
  90. Relationship between Long QT Syndrome and SIDS
  91. Screenings of newborns and athletes for genetic heart disease
  92. Video: Septal myectomy and apical myectomy
  93. Sports Cardiology Program
  94. Treating Long QT Patients Who Have Asthma
  95. Treating Pericarditis
  96. When a fainting episode might suggest a LQTS diagnosis
  97. Bronchitis
  98. Brucellosis
  99. Brugada syndrome
  100. Build resilience to better handle diabetes
  101. Caffeine and depression: Is there a link?
  102. Caffeine: Does it affect blood sugar?
  103. Calcium supplements: A risk factor for heart attack?
  104. Can chicken soup cure a cold?
  105. Infertility and endometriosis
  106. Can I still experience endometriosis after menopause?
  107. Can vitamins help prevent a heart attack?
  108. Cancer
  109. Cancer blood tests
  110. Myths about cancer causes
  111. Infographic: Cancer Clinical Trials Offer Many Benefits
  112. Cancer diagnosis: 11 tips for coping
  113. Cancer diagnosis? Advice for dealing with what comes next
  114. Cancer-related fatigue
  115. Cancer pain: Relief is possible
  116. Cancer risk: What the numbers mean
  117. Cancer surgery
  118. Cancer survival rate
  119. Cancer survivors: Care for your body after treatment
  120. Cancer survivors: Late effects of cancer treatment
  121. Cancer survivors: Managing your emotions after cancer treatment
  122. Cancer survivors: Reconnecting with loved ones after treatment
  123. Cancer treatment decisions: 5 steps to help you decide
  124. Cancer treatment for men: Possible sexual side effects
  125. Cancer treatment for women: Possible sexual side effects
  126. Cancer treatment myths
  127. Cancer Vaccine Research
  128. Cannabis for MS: Can it help treat symptoms?
  129. Can't sleep? Try daytime exercise
  130. Cardiac asthma: What causes it?
  131. Infographic: Cardiac sarcoidosis: A heart under attack
  132. Cardiomyopathy
  133. Caring for a loved one with diabetes
  134. Castleman disease
  135. Celiac disease
  136. Celiac disease: Can gluten be absorbed through the skin?
  137. Celiac disease diet: How do I get enough grains?
  138. Chagas disease
  139. Chelation therapy for heart disease: Does it work?
  140. Chemo brain
  141. Chemotherapy side effects: A cause of heart disease?
  142. Chicken soup: Can it treat a cold?
  143. Cholangiocarcinoma (bile duct cancer)
  144. Cholera
  145. Chronic fatigue: Can a natural remedy boost my energy?
  146. Chronic fatigue syndrome
  147. Chronic kidney disease
  148. Chronic lymphocytic leukemia
  149. Chronic myelogenous leukemia
  150. Chronic sinusitis
  151. Churg-Strauss syndrome
  152. Cirrhosis
  153. Clinical depression: What does that mean?
  154. Coconut oil: Can it cure hypothyroidism?
  155. Coffee after dinner? Make it decaf
  156. Cold and flu viruses: How long can they live outside the body?
  157. Cold or allergy: Which is it?
  158. Cold remedies
  159. Cold symptoms: Does drinking milk increase phlegm?
  160. Colon cancer
  161. Colon Cancer Family Registry
  162. Colon cancer screening: At what age can you stop?
  163. Colon cancer screening
  164. Common cold
  165. Concussion
  166. Concussion in children
  167. Concussion Recovery
  168. Concussion Telemedicine
  169. Control your portions, control your weight
  170. Anxiety and diet
  171. Coping with endometriosis pain
  172. Coping with side effects of hepatitis C drugs
  173. Coronary artery spasm: Cause for concern?
  174. Craving and chewing ice: A sign of anemia?
  175. Crohn's Crisis
  176. Crohn's disease
  177. Crohn’s disease: Can prebiotics help?
  178. Crohn's disease symptom: Is fatigue common?
  179. Crohn's or Colitis
  180. Cupping therapy: Can it relieve fibromyalgia pain?
  181. Curcumin: Can it slow cancer growth?
  182. Cushing syndrome
  183. Cyclospora infection
  184. Cyclothymia (cyclothymic disorder)
  185. Daily aspirin therapy
  186. Day-to-day with endometriosis: Challenge your expectations
  187. Dealing with anxiety after Hodgkin's lymphoma
  188. Demyelinating disease: What can you do about it?
  189. Depression and anxiety: Can I have both?
  190. Depression, anxiety and exercise
  191. Depression: Diagnosis is key
  192. Depression in women: Understanding the gender gap
  193. Depression (major depressive disorder)
  194. Depression: Provide support, encouragement
  195. Depression: Supporting a family member or friend
  196. Dermatomyositis
  197. Diabetes
  198. Diabetes and Alzheimer's
  199. Diabetes and dental care
  200. Diabetes and depression: Coping with the two conditions
  201. Diabetes and exercise: When to monitor your blood sugar
  202. Diabetes and fasting: Can I fast during Ramadan?
  203. Diabetes and foot care
  204. Diabetes and Heat
  205. Diabetes and menopause
  206. Diabetes and summer: How to beat the heat
  207. Diabetes and travel: Planning is key
  208. Diabetes and electric blankets
  209. 10 ways to avoid diabetes complications
  210. Diabetes diet: Create your healthy-eating plan
  211. Diabetes diet: Should I avoid sweet fruits?
  212. Diabetes: Does alcohol and tobacco use increase my risk?
  213. Diabetes foods: Is honey a good substitute for sugar?
  214. Diabetes and liver
  215. Diabetes management: Does aspirin therapy prevent heart problems?
  216. Diabetes management: How lifestyle, daily routine affect blood sugar
  217. Diabetes: Eating out
  218. Diabetes nutrition: Sweets
  219. Diabetes prevention: 5 tips for taking control
  220. Diabetes symptoms
  221. Diabetes treatment: Can cinnamon lower blood sugar?
  222. Medications for type 2 diabetes
  223. Using insulin
  224. Diabetic coma
  225. Diabetic ketoacidosis
  226. Cancer-related diarrhea
  227. Dilated cardiomyopathy
  228. Does smoking have an effect on Crohn's disease?
  229. Does zinc work for colds?
  230. Drinking after hepatitis C cure: Is it safe?
  231. Drummer Beats Heart Disease
  232. Dumping syndrome
  233. Early hepatitis C infection: How often does it become chronic?
  234. Early HIV symptoms: What are they?
  235. Eastern equine encephalitis (EEE): What is it?
  236. Eating during cancer treatment: Tips to make food tastier
  237. Eating well when you have Crohn's disease
  238. Ebstein anomaly
  239. Echinacea: Is it effective for the common cold?
  240. ED Drugs for Pulmonary Hypertension
  241. Heart transplant to treat dilated cardiomyopathy: Elmo's story
  242. Emerging treatments for multiple sclerosis
  243. Encephalitis
  244. Endocarditis
  245. Endometriosis
  246. Endometriosis risk factors
  247. Endometriosis: Risk factor for ovarian cancer?
  248. Endometriosis: Treatment options
  249. Testing for endometriosis
  250. Enlarged liver
  251. Enlarged spleen (splenomegaly)
  252. Esophageal cancer
  253. Infographic: Esophageal Cancer
  254. Estriol as a potential treatment option for multiple sclerosis (MS)
  255. Ewing sarcoma
  256. Exercise and multiple sclerosis
  257. External Drive: Charles' Artificial Heart
  258. Fasting diet: Can it improve my heart health?
  259. Fibromyalgia
  260. Fibromyalgia or not?
  261. Fibromyalgia and acupuncture
  262. Fibromyalgia: Does exercise help or hurt?
  263. Fibromyalgia: Linked to other health problems?
  264. Fibromyalgia pain: Options for coping
  265. Fibromyalgia: Self-care tips
  266. Fibromyalgia and Neurontin
  267. Finding balance: Tips to manage life with endometriosis
  268. Fingolimod during pregnancy: Is it safe?
  269. Fish oil and depression
  270. Flu masks
  271. Flu Shot Prevents Heart Attack
  272. Flu shots
  273. Flu shots and heart disease
  274. Flu: When to see a doctor?
  275. Flu vaccine: Safe for people with egg allergy?
  276. Fluzone High-Dose: What distinguishes it from other flu vaccines?
  277. Foods and sleep
  278. Gaucher disease
  279. Generalized anxiety disorder
  280. Genetics and Cardiomyopathy
  281. GI Stents
  282. Giardia infection (giardiasis)
  283. Glomerulonephritis
  284. GLP-1 agonists: Diabetes drugs and weight loss
  285. Glycemic index: A helpful tool for diabetes?
  286. Grand mal seizure
  287. Granulomatosis with polyangiitis
  288. Grass-fed beef
  289. Graves' dermopathy: How is it treated?
  290. Graves' disease
  291. Hairy cell leukemia
  292. Hangover prevention: Do lighter colored drinks help?
  293. Hangovers
  294. Hashimoto's disease
  295. Have a cold? Common sense rules
  296. Have a cold? Fight back with humidity
  297. Have a cold? Fight it with fluids
  298. Healthy eating: One step at a time
  299. Healthy Heart for Life!
  300. Healthy heart for life: Avoiding heart disease
  301. Heart arrhythmias
  302. Heart attack
  303. Heart attack prevention: Should I avoid secondhand smoke?
  304. Heart attack symptoms
  305. Heart Attack Timing
  306. Heart disease
  307. Heart disease in women: Understand symptoms and risk factors
  308. Heart failure
  309. Heart failure and sex: Is it safe?
  310. Heart-healthy diet: 8 steps to prevent heart disease
  311. Heat exhaustion
  312. Heavy periods: Can folic acid help?
  313. Hemochromatosis
  314. Hemolytic uremic syndrome (HUS)
  315. Hemophilia
  316. Hepatitis A
  317. Hepatitis B
  318. Hepatitis C
  319. Hepatitis C: How common is sexual transmission?
  320. Hepatitis C: What happens in end-stage liver disease?
  321. Herbal treatment for anxiety: Is it effective?
  322. Hiatal hernia
  323. High-dose vitamin C: Can it kill cancer cells?
  324. Hirschsprung's disease
  325. HIV/AIDS
  326. Hodgkin's lymphoma (Hodgkin's disease)
  327. Diet and Hodgkin's lymphoma recovery
  328. Hodgkin's vs. non-Hodgkin's lymphoma: What's the difference?
  329. Holiday Heart
  330. Honey: An effective cough remedy?
  331. How well do you wash your hands?
  332. Humidifier care 101
  333. Humidifiers
  334. Huntington's disease
  335. Hypercalcemia
  336. Hyperglycemia in diabetes
  337. Hyperinsulinemia: Is it diabetes?
  338. Hyperparathyroidism
  339. Hyperthyroidism
  340. Hypertrophic cardiomyopathy
  341. Infographic: Hypertrophic Cardiomyopathy
  342. Hyponatremia
  343. Hypoparathyroidism
  344. Hypopituitarism
  345. Hypothermia
  346. Hypothyroidism: Can calcium supplements interfere with treatment?
  347. Hypothyroidism diet
  348. Hypothyroidism and joint pain?
  349. Hypothyroidism: Should I take iodine supplements?
  350. Hypothyroidism symptoms: Can hypothyroidism cause eye problems?
  351. Hypothyroidism
  352. IBD and colon cancer: How often do you need screening?
  353. Inflammatory bowel disease (IBD)
  354. Influenza (flu)
  355. Infographic: Innovative Rectal Cancer Treatments
  356. Insomnia
  357. Insomnia: How do I stay asleep?
  358. Insomnia treatment: Cognitive behavioral therapy instead of sleeping pills
  359. Insulin and weight gain
  360. Insulin therapy options
  361. Intensive insulin therapy
  362. Intervention: Help a loved one overcome addiction
  363. Iron deficiency anemia
  364. Is antibacterial soap a do or a don't?
  365. Is depression a factor in rheumatoid arthritis?
  366. Is fibromyalgia hereditary?
  367. Is there a multiple sclerosis diet?
  368. Jet lag disorder
  369. Depression and diet
  370. Kidney cancer
  371. Infographic: Kidney Cancer
  372. Kidney Cancer
  373. Lack of sleep: Can it make you sick?
  374. Late-night eating: OK if you have diabetes?
  375. LADA
  376. Preventing lead exposure
  377. Lead poisoning
  378. Legionnaires' disease
  379. Leukemia
  380. Lexapro side effects: Is breast tenderness common?
  381. Liver cancer
  382. Infographic: Liver Cancer
  383. Infographic: Liver Transplant Bile Duct Cancer
  384. Liver transplant for hepatitis C
  385. Living better with endometriosis
  386. Living better after Hodgkin's lymphoma
  387. Living well with Crohn's disease
  388. Living with Lupus
  389. Long QT syndrome
  390. Long-term safety of natalizumab for treating multiple sclerosis
  391. Low blood counts
  392. Low blood pressure (hypotension)
  393. Low blood sodium in older adults: A concern?
  394. Low-phosphorus diet: Helpful for kidney disease?
  395. Lupus
  396. Lupus: Can it cause hair loss?
  397. Lupus: Can it cause hives?
  398. Lupus affects kidneys
  399. Lyme disease
  400. Maintaining intimacy through Hodgkin's lymphoma
  401. Male depression: Understanding the issues
  402. Male hypogonadism
  403. Managing anxiety in MS: What works?
  404. Managing depression in MS
  405. Diabetes and carbs
  406. Mangosteen juice: Can it relieve arthritis pain?
  407. MAOIs and diet: Is it necessary to restrict tyramine?
  408. Marijuana and depression
  409. Mayo Clinic Minute: The facts about three flu vaccine myths
  410. Mayo Clinic Minute: Why you need your flu shot now
  411. Mayo Clinic Minute: Will there be a Lyme disease vaccine for humans?
  412. Measles Virus as a Cancer Fighter
  413. Membranous nephropathy
  414. Menorrhagia
  415. Mental health: Overcoming the stigma of mental illness
  416. Mental health providers: Tips on finding one
  417. Mental illness
  418. Menus for heart-healthy eating
  419. Mild depression: Are antidepressants effective?
  420. Mindfulness practice: Can it reduce symptoms of MS?
  421. Mitral valve prolapse
  422. Mitral valve regurgitation
  423. Mitral valve stenosis
  424. Mixed connective tissue disease
  425. Monoamine oxidase inhibitors (MAOIs)
  426. Monoclonal antibody drugs
  427. Mononucleosis
  428. Mononucleosis: Can it recur?
  429. Mononucleosis and Epstein-Barr: What's the connection?
  430. Mort Crim and Cancer
  431. Mouth sores caused by cancer treatment: How to cope
  432. MRI: Is gadolinium safe for people with kidney problems?
  433. Multiple myeloma
  434. Infographic: Multiple Myeloma
  435. Multiple sclerosis
  436. Infographic: Multiple Sclerosis
  437. Multiple sclerosis: Can it cause seizures?
  438. Mumps
  439. Myelodysplastic syndromes
  440. Myelofibrosis
  441. Myelofibrosis
  442. Myocarditis
  443. Natural remedies for depression: Are they effective?
  444. Nervous breakdown: What does it mean?
  445. Neti pot: Can it clear your nose?
  446. Neti pot solution: Can I make my own?
  447. New Hep C Treatment
  448. No appetite? How to get nutrition during cancer treatment
  449. Nonalcoholic fatty liver disease
  450. Non-Hodgkin's lymphoma
  451. Not tired? Don't go to bed
  452. NSAIDs: Do they increase my risk of heart attack and stroke?
  453. Nuts and your heart: Eating nuts for heart health
  454. He's the bravest kid I've ever seen
  455. Oil of oregano: Can it treat sinusitis?
  456. Omega-3 in fish
  457. Omega-6 fatty acids
  458. Osteoporosis and long-term prednisone: What is the risk?
  459. Living with an ostomy
  460. Pain and depression: Is there a link?
  461. Palindromic rheumatism: Precursor to rheumatoid arthritis?
  462. Parvovirus infection
  463. Pectus excavatum
  464. Pectus Excavatum
  465. Pelvic inflammatory disease (PID)
  466. Pericarditis
  467. Peritonitis
  468. Persistent depressive disorder (dysthymia)
  469. Personalized therapy for multiple sclerosis (MS)
  470. Plague
  471. Plugged ears: What is the remedy?
  472. Pneumonia
  473. Pneumonitis
  474. Polio
  475. Polycythemia vera
  476. Polymyalgia rheumatica
  477. Polymyositis
  478. Polymyositis : Can it affect my lungs?
  479. Polypill: Does it treat heart disease?
  480. Post-concussion syndrome
  481. Postpartum depression
  482. Postpartum thyroiditis
  483. Post-polio syndrome
  484. Prediabetes
  485. Premenstrual dysphoric disorder
  486. Premenstrual syndrome (PMS)
  487. PrEP to prevent HIV
  488. Prescription sleeping pills: What's right for you?
  489. Primary biliary cholangitis
  490. Primary sclerosing cholangitis
  491. Protein: Heart-healthy sources
  492. Pulmonary atresia
  493. Pulmonary edema
  494. Pulmonary fibrosis
  495. Pulmonary hypertension
  496. Pulmonary valve stenosis
  497. Put fish on the menu
  498. Q fever
  499. Reactive hypoglycemia: What can I do?
  500. Reading food labels
  501. Rectal cancer
  502. Recurring strep throat: When is tonsillectomy useful?
  503. Red wine, antioxidants and resveratrol
  504. Endometriosis: Reduce pain during sex
  505. Renal diet for vegetarians
  506. Resources to help you live well with Crohn's disease
  507. Rethinking Rheumatoid Arthritis
  508. Working after Hodgkin's lymphoma
  509. Rhabdomyolysis
  510. Rheumatic fever
  511. Rheumatoid arthritis
  512. Rheumatoid Arthritis
  513. Rheumatoid arthritis and exercise
  514. Rheumatoid arthritis: Vaccines
  515. Rheumatoid arthritis diet
  516. Rheumatoid arthritis: Can it affect the eyes?
  517. Rheumatoid arthritis: Can it affect the lungs?
  518. Rheumatoid arthritis: Does pregnancy affect symptoms?
  519. Rheumatoid arthritis medications: Dangerous during pregnancy?
  520. Rheumatoid arthritis pain: Tips for protecting your joints
  521. Robotic heart surgery treats mitral regurgitation: Ed's story
  522. Rocky Mountain spotted fever
  523. Roseola
  524. Salt craving: A symptom of Addison's disease?
  525. Sarcoidosis
  526. Savella may help fatigue
  527. Selective serotonin reuptake inhibitors (SSRIs)
  528. Self-care for the flu
  529. Self-Image During Cancer
  530. Serotonin and norepinephrine reuptake inhibitors (SNRIs)
  531. Service dogs assist with diabetes care
  532. Infographic: Shedding light on dangerous faints
  533. Sheehan's syndrome
  534. Shingles
  535. Shingles and alcohol
  536. Shingles vaccine: Can I transmit the vaccine virus to others?
  537. Shingles vaccine: Should I get it?
  538. Sick sinus syndrome
  539. Silent heart attack
  540. Sinus headaches
  541. Sinus infection and toothache: Any connection?
  542. Sjogren's syndrome
  543. Sjogren's syndrome: Can it cause recurrent UTIs?
  544. Skip booze for better sleep
  545. Blood sugar testing
  546. Coping with Hodgkin's lymphoma with laughter
  547. Radiation simulation
  548. Small cell, large cell cancer: What this means
  549. Small vessel disease
  550. Smallpox
  551. Sodium: Smarten up
  552. Somatic symptom disorder
  553. Soy: Does it worsen hypothyroidism?
  554. Fitness after lymphoma treatment
  555. Staying active with Crohn's disease
  556. Stomach cancer
  557. Infographic: Stomach Cancer
  558. Heart disease prevention
  559. Strep throat
  560. Strep throat in infants: A common diagnosis?
  561. Stress management for MS
  562. Stuffy nose? Try saline spray
  563. Sudden cardiac arrest
  564. Sudden death in young people: Heart problems often blamed
  565. Sunburn
  566. Sunburn treatment: Do I need medical attention?
  567. Swine flu (H1N1 flu)
  568. Takayasu's arteritis
  569. Tanning: Does a base tan prevent sunburn?
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  572. Thalassemia
  573. Thalidomide: Research advances in cancer and other conditions
  574. Infographic: The blueprints to your heart
  575. The dawn phenomenon: What can you do?
  576. Tips for coping with rheumatoid arthritis
  577. Tips for cutting costs of blood glucose test strips
  578. Tips for easing stress when you have Crohn's disease
  579. Toxic hepatitis
  580. Toxoplasmosis
  581. Treatment-resistant depression
  582. Tricuspid atresia
  583. Tricuspid valve regurgitation
  584. Tricyclic antidepressants and tetracyclic antidepressants
  585. Tuberculosis
  586. Tumor vs. cyst: What's the difference?
  587. Type 1 diabetes
  588. Type 1 diabetes in children
  589. Type 2 diabetes
  590. Type 2 diabetes in children
  591. Typhoid fever
  592. Ulcerative colitis
  593. Ulcerative colitis flare-ups: 5 tips to manage them
  594. Understanding amyloidosis
  595. Understanding your amyloidosis treatment options
  596. Use these tips to help children prevent diabetes
  597. Valerian: A safe and effective herbal sleep aid?
  598. Valley fever
  599. Vasculitis
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  601. Ventricular septal defect
  602. Vicks VapoRub: An effective nasal decongestant?
  603. Video: Heart and circulatory system
  604. How cancer spreads
  605. How diabetes affects your blood sugar
  606. Mitral valve regurgitation
  607. PICC line placement
  608. Video-kidney cancer patient-tattoo
  609. Viral hemorrhagic fevers
  610. Vitamin B-12 and depression
  611. Vitamin C: Can it prevent colds?
  612. Vitamin D and MS: Any connection?
  613. Can having vitamin D deficiency cause high blood pressure?
  614. Vitamin deficiency anemia
  615. Vitamins for MS: Do supplements make a difference?
  616. Von Willebrand disease
  617. Walking pneumonia
  618. Warm-mist versus cool-mist humidifier: Which is better for a cold?
  619. Watch an interview with Fernando C Fervenza MD PhD
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  621. What causes endometriosis? Theories about how endo starts
  622. Heart failure action plan
  623. What is amyloidosis?
  624. What is meant by the term heart age?
  625. What's the difference between H1N1 flu and influenza A?
  626. When cancer returns: How to cope with cancer recurrence
  627. Whiplash
  628. Whipple's disease
  629. Whooping cough
  630. Whooping cough
  631. Why isn't there a hepatitis C vaccine?
  632. Wilson's disease
  633. Wilson's syndrome: An accepted medical diagnosis?
  634. Infographic: Women and Heart Disease
  635. Working with your doctor when you have amyloidosis
  636. Endometriosis: Working with your doctor
  637. Your secret weapon during cancer treatment? Exercise!
  638. Effectively managing chronic kidney disease
  639. Kidney Cancer — Bradley Leibovich, M.D., Mayo Clinic
  640. Do zinc supplements shorten colds?