In-depth

Acromegaly

Acute kidney injury

Acute lymphocytic leukemia

Acute myelogenous leukemia

Acute sinusitis

Addison's disease

Alcoholic hepatitis (Alcohol-associated hepatitis)

Alpha-1-antitrypsin deficiency

Amyloidosis

Anaphylaxis

Anemia

Angina

Anorexia nervosa

Anthrax

Anxiety disorders

Aortic valve regurgitation

Aortic valve stenosis

Aplastic anemia

ARDS

Arteriovenous fistula

Ascariasis

Aspergillosis

Astrocytoma

Atrial septal defect (ASD)

Atrioventricular canal defect

Autoimmune hepatitis

B-cell lymphoma

Bipolar disorder

Blastocystis hominis

Bone cancer

Bradycardia

Brain tumor

Bronchitis

Brucellosis

Brugada syndrome

Burkitt lymphoma

Cancer

Cardiomyopathy

Castleman disease

Celiac disease

Chagas disease

Chemo brain

Cholangiocarcinoma (bile duct cancer)

Cholera

Chronic kidney disease

Chronic lymphocytic leukemia

Chronic myelogenous leukemia

Chronic sinusitis

Churg-Strauss syndrome

Cirrhosis

Colon cancer

Common cold

Concussion

Crohn's disease

Cushing syndrome

Cyclothymia (cyclothymic disorder)

Depression (major depressive disorder)

Dermatomyositis

Diabetes

Diabetes affects how your body uses blood sugar. Too much blood sugar over long periods can cause serious health problems, but treatments are available.

Diabetic coma

Diabetic ketoacidosis

Diffuse large B-cell lymphoma

Diffuse midline glioma (DMG)

Dilated cardiomyopathy

Dumping syndrome

Ebstein anomaly

Encephalitis

Endocarditis

Endometriosis

Enlarged liver

Enlarged spleen (splenomegaly)

Esophageal cancer

Ewing sarcoma

Fibromyalgia

Follicular lymphoma

Gaucher disease

Generalized anxiety disorder

Giardia infection (giardiasis)

Glomerulonephritis

Granulomatosis with polyangiitis

Graves' disease

H1N1 flu (swine flu)

Hairy cell leukemia

Hangovers

Hashimoto's disease

Heart arrhythmia

Heart attack

Heart disease

Heart failure

Heat exhaustion

Heavy menstrual bleeding

Hemochromatosis

Hemolytic uremic syndrome (HUS)

Hemophilia

Hepatitis A

Hepatitis B

Hepatitis C

Hiatal hernia

Hilar cholangiocarcinoma

Hirschsprung's disease

HIV/AIDS

Hodgkin lymphoma (Hodgkin disease)

Huntington's disease

Hypercalcemia

Hyperglycemia in diabetes

Hyperparathyroidism

Hyperthyroidism (overactive thyroid)

Hypertrophic cardiomyopathy

Hyponatremia

Hypoparathyroidism

Hypopituitarism

Hypothermia

Hypothyroidism (underactive thyroid)

Inflammatory bowel disease (IBD)

Influenza (flu)

Insomnia

Iron deficiency anemia

Jet lag disorder

Kidney cancer

Lead poisoning

Legionnaires' disease

Leukemia

Liver cancer

Liver disease

Long QT syndrome

Low blood pressure (hypotension)

Lupus

Lyme disease

Lymphoma

Male hypogonadism

Mantle cell lymphoma

Medulloblastoma

Membranous nephropathy

Mental illness

Metastatic (stage 4) prostate cancer

Mitral valve prolapse

Mitral valve regurgitation

Mitral valve stenosis

Mixed connective tissue disease

Mononucleosis

Multiple myeloma

Multiple sclerosis

Multisystem inflammatory syndrome in children (MIS-C)

Mumps

Myelodysplastic syndromes

Myelofibrosis

Myocarditis

Nonalcoholic fatty liver disease

Non-Hodgkin lymphoma

Pancreatic neuroendocrine tumors

Parvovirus infection

Pectus excavatum

Pelvic inflammatory disease (PID)

Pericarditis

Peritoneal carcinomatosis

Peritonitis

Persistent depressive disorder

Persistent post-concussive symptoms (Post-concussion syndrome)

Plague

Pneumonia

Pneumonitis

Polio

One of the most feared diseases of the 20th century, polio has been eradicated from the developed world but remains a threat in less developed nations.

Polycythemia vera

Polymyalgia rheumatica

Polymyositis

Post COVID syndrome

Postpartum depression

Post-polio syndrome

Prediabetes

Premenstrual syndrome (PMS)

Primary biliary cholangitis

Primary sclerosing cholangitis (PSC)

Pulmonary atresia

Pulmonary atresia with intact ventricular septum

Pulmonary edema

Pulmonary fibrosis

Pulmonary hypertension

Pulmonary valve stenosis

Rectal cancer

Rheumatic fever

Rheumatoid arthritis

Roseola

Sarcoidosis

Sheehan's syndrome

Shingles

Sick sinus syndrome

Sinus headaches

Sjogren's syndrome

Small lymphocytic lymphoma

Small vessel disease

Smallpox

Somatic symptom disorder

Stomach cancer

Strep throat

Sudden cardiac arrest

Sunburn

Takayasu's arteritis

T-cell lymphoma

Teen depression

Thalassemia

Tonic-clonic (grand mal) seizure

Toxoplasmosis

Tricuspid atresia

Tricuspid valve regurgitation

Tuberculosis

Type 1 diabetes

Type 1 diabetes in children

Type 2 diabetes

Type 2 diabetes in children

Typhoid fever

Ulcerative colitis

Valley fever

Vasculitis

Ventricular septal defect (VSD)

VEXAS syndrome

Viral hemorrhagic fevers

Vitamin deficiency anemia

Von Willebrand disease

West Nile virus

Whiplash

Whipple's disease

Whooping cough

Wilson's disease

From Mayo Clinic to your inbox

Sign up for free and stay up to date on research advancements, health tips, current health topics, and expertise on managing health. Click here for an email preview.

We use the data you provide to deliver you the content you requested. To provide you with the most relevant and helpful information, we may combine your email and website data with other information we have about you. If you are a Mayo Clinic patient, we will only use your protected health information as outlined in our Notice of Privacy Practices. You may opt out of email communications at any time by clicking on the unsubscribe link in the email.

Feb. 11, 2023

See also

  2. 10 ways to avoid diabetes complications
  3. 6 tips to manage rheumatoid arthritis symptoms
  4. A leaky tricuspid valve
  5. Acute lymphocytic leukemia
  6. Acute sinusitis
  7. Acute sinusitis: Do over-the-counter treatments help?
  8. Addison's disease
  9. Amyloidosis
  10. Anaphylaxis: First aid
  11. Anemia
  12. Angina
  13. Anorexia nervosa
  14. Anthrax
  15. Antidepressants and weight gain: What causes it?
  16. Antidepressants: Can they stop working?
  17. Anxiety and diet
  18. Anxiety disorders
  19. Aortic calcification: An early sign of heart valve problems?
  20. Aortic valve regurgitation
  21. Aortic valve stenosis
  22. ARDS
  23. Artificial sweeteners: Any effect on blood sugar?
  24. Ascariasis
  25. Atrial septal defect (ASD)
  26. Biliary tract cancer: Should I get a second opinion?
  27. Bipolar disorder
  28. Bipolar disorder and alcoholism: Are they related?
  29. Bipolar disorder in children: Is it possible?
  30. Blastocystis hominis
  31. Blood sugar testing: Why, when and how
  32. Blood tests for heart disease
  33. Bone cancer
  34. Brain tumor
  35. Can vitamins help prevent a heart attack?
  36. Cancer blood tests
  37. Cancer pain: Relief is possible
  38. Cancer survival rate
  39. Cancer-related fatigue
  40. Cardiac asthma: What causes it?
  41. Celiac disease
  42. Chelation therapy for heart disease: Does it work?
  43. Chemo brain
  44. Chronic kidney disease
  45. Chronic kidney disease: Is a clinical trial right for me?
  46. Chronic sinusitis
  47. Coconut oil: Can it cure hypothyroidism?
  48. Cold symptoms: Does drinking milk increase phlegm?
  49. Colon Cancer Family Registry
  50. Common cold
  51. Concussion
  52. Concussion in children
  53. Craving and chewing ice: A sign of anemia?
  54. Crohn's Crisis
  55. Crohn's disease and the gut microbiome
  56. Dermatomyositis
  57. Diabetes
  58. Diabetes and depression: Coping with the two conditions
  59. Diabetes and exercise: When to monitor your blood sugar
  60. Diabetes and heat
  61. Diabetes diet: Should I avoid sweet fruits?
  62. Diabetes foods: Can I substitute honey for sugar?
  63. Diabetes management: How lifestyle, daily routine affect blood sugar
  64. Diabetic ketoacidosis
  65. Dilated cardiomyopathy
  66. Do zinc supplements shorten colds?
  67. Does stress make rheumatoid arthritis worse?
  68. Drummer Beats Heart Disease
  69. Dumping syndrome
  70. Early HIV symptoms: What are they?
  71. Ebstein anomaly
  72. ED Drugs for Pulmonary Hypertension
  73. Effectively managing chronic kidney disease
  74. Endometriosis FAQs
  75. Enlarged spleen (splenomegaly)
  76. Esophageal cancer
  77. Ewing sarcoma
  78. Explaining multiple sclerosis
  79. Fatty liver disease (MASLD) diet
  80. Fibromyalgia
  81. Flu shots
  82. Flu shots and heart disease
  83. Flu vaccine: Safe for people with egg allergy?
  84. Follicular lymphoma
  85. Gaucher disease
  86. Genetics and Cardiomyopathy
  87. GI Stents
  88. Glycemic index: A helpful tool for diabetes?
  89. Grass-fed beef
  90. Hairy cell leukemia
  91. Healthy Heart for Life!
  92. Heart attack
  93. Heart attack prevention: Should I avoid secondhand smoke?
  94. Heart attack symptoms
  95. Heart Attack Timing
  96. Heart disease
  97. Heart disease in women: Understand symptoms and risk factors
  98. Heart failure
  99. Heart failure action plan
  100. Heat exhaustion
  101. Heavy periods: Can folic acid help?
  102. Hepatitis B and Hepatitis C: What’s the difference?
  103. Hepatitis C
  104. Hepatitis C: What happens in end-stage liver disease?
  105. Herbal treatment for anxiety: Is it effective?
  106. High-dose flu vaccines: How are they different from other flu vaccines?
  107. High-dose vitamin C: Can it kill cancer cells?
  108. Hilar cholangiocarcinoma
  109. Hodgkin lymphoma (Hodgkin disease)
  110. Hodgkin vs. non-Hodgkin lymphoma: What's the difference?
  111. How do I reduce fatigue from rheumatoid arthritis?
  112. How kidneys work
  113. Hypercalcemia
  114. Hyperthyroidism (overactive thyroid)
  115. Hypertrophic cardiomyopathy
  116. Hyponatremia
  117. Hypoparathyroidism
  118. Hypopituitarism
  119. Hypothermia
  120. Hypothyroidism (underactive thyroid)
  121. Hypothyroidism and joint pain?
  122. Hypothyroidism: Can calcium supplements interfere with treatment?
  123. Influenza (flu)
  124. Infographic: Multiple Myeloma
  125. Infographic: Pancreatic Neuroendocrine Tumors
  126. Insomnia: How do I stay asleep?
  127. Insulin and weight gain
  128. Is there a special diet for Crohn's disease?
  129. Jack Long — Live LONG - Beat STRONG to find a cure
  130. Jet lag disorder
  131. Kidney Cancer
  132. Kidney cancer FAQs
  133. Kidney disease FAQs
  134. Lack of sleep: Can it make you sick?
  135. LADA
  136. Lead poisoning
  137. Liver cancer
  138. Long Term Brain Cancer Survivor
  139. Low blood counts
  140. Low blood sodium in older adults: A concern?
  141. Low-phosphorus diet: Helpful for kidney disease?
  142. Lyme disease
  143. Lymphoma FAQs
  144. Male depression: Understanding the issues
  145. Male hypogonadism
  146. Mayo Clinic Minute: Will there be a Lyme disease vaccine for humans?
  147. Mental health providers: Tips on finding one
  148. Mental health: Overcoming the stigma of mental illness
  149. Mental illness
  150. Mitral valve overview
  151. Mitral valve regurgitation
  152. Multiple myeloma
  153. Multiple sclerosis FAQs
  154. Multisystem inflammatory syndrome in children (MIS-C)
  155. Mumps
  156. Myelodysplastic syndromes
  157. Myths about cancer causes
  158. Natural remedies for depression: Are they effective?
  159. Neti pot: Can it clear my nose?
  160. Non-Hodgkin lymphoma
  161. NSAIDs: Do they increase my risk of heart attack and stroke?
  162. Omega-6 fatty acids
  163. Pancreatic neuroendocrine tumors
  164. Parvovirus infection
  165. Pericarditis
  166. Peritoneal carcinomatosis
  167. Peritonitis
  168. Petroleum jelly: Safe for a dry nose?
  169. PICC line placement
  170. Plague
  171. Polio
  172. Polypill: Does it treat heart disease?
  173. Postpartum depression
  174. Premenstrual dysphoric disorder
  175. Prescription sleeping pills: What's right for you?
  176. Pulmonary atresia
  177. Pulmonary atresia with intact ventricular septum
  178. Pulmonary hypertension
  179. Pulmonary valve stenosis
  180. Reactive hypoglycemia: What can I do?
  181. Rectal cancer
  182. Red wine, antioxidants and resveratrol
  183. Rhabdomyolysis
  184. Rheumatoid arthritis
  185. Rheumatoid arthritis: Can it affect the lungs?
  186. Rheumatoid arthritis: Does pregnancy affect symptoms?
  187. Robotic heart surgery treats mitral regurgitation: Ed's story
  188. Sarcoidosis
  189. Self-care for fatty liver disease (MASLD)
  190. Self-care for the flu
  191. Shingles
  192. Shingles vaccine: Can I transmit the vaccine virus to others?
  193. Shingles vaccine: Should I get it?
  194. Sick sinus syndrome
  195. Silent heart attack
  196. Sinus headaches
  197. Sinus infection and toothache: Any connection?
  198. Small lymphocytic lymphoma
  199. Smallpox
  200. Test anxiety: Can it be treated?
  201. Thalassemia
  202. The dawn phenomenon: What can you do?
  203. Thyroid disease: Can it affect a person's mood?
  204. Thyroid peroxidase antibody test: What is it?
  205. Tips to make your mornings easier
  206. Treating Pericarditis
  207. Tricuspid valve regurgitation
  208. Tuberculosis
  209. Type 1 diabetes FAQs
  210. Type 1 diabetes in children
  211. Type 2 diabetes
  212. Typhoid fever
  213. Ulcerative colitis vs. Crohn's disease
  214. Understanding complement 3 glomerulopathy (C3G)
  215. Using insulin
  216. VEXAS syndrome
  217. Video: Heart and circulatory system
  218. Video: Septal myectomy and apical myectomy
  219. Vitamin B-12 and depression
  220. Vitamin deficiency anemia
  221. Vitamins for MS: Do supplements make a difference?
  222. Von Willebrand disease
  223. Walking pneumonia
  224. What is biliary tract cancer?
  225. What is cirrhosis? A Mayo Clinic expert explains
  226. What is Crohn's disease? A Mayo Clinic expert explains
  227. What is kidney cancer? An expert explains
  228. What is kidney disease? An expert explains
  229. What is stomach cancer? A Mayo Clinic expert explains
  230. What is type 1 diabetes? A Mayo Clinic expert explains
  231. What is ulcerative colitis? A Mayo Clinic expert explains
  232. White stool: Should I be concerned?
  233. Whooping cough
  234. Whooping cough
  235. Why isn't there a hepatitis C vaccine?