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