In-depth

Acromegaly

Acute sinusitis

Alcohol intolerance

Amenorrhea

Although the absence of menstruation (amenorrhea) is seldom serious, the condition can often be linked to an underlying problem requiring treatment.

Anemia

Aneurysms

Aplastic anemia

Arteriovenous malformation

Aspergillosis

Astigmatism

Astrocytoma

Autoimmune neurological disorder

Bee sting

Behcet disease

Bell's palsy

Brain aneurysm

Brain AVM (arteriovenous malformation)

Brain tumor

Brucellosis

Carbon monoxide poisoning

Carotid artery disease

Central nervous system (CNS) lymphoma

Central sleep apnea

Chagas disease

Child abuse

Chordoma

Chronic sinusitis

Coarctation of the aorta

Cold sore

Common cold

Concussion

Convergence insufficiency

Cough headaches

Craniopharyngioma

CSF leak (Cerebrospinal fluid leak)

Cushing syndrome

Dehydration

Depression (major depressive disorder)

Diffuse large B-cell lymphoma

Diffuse midline glioma (DMG)

Ear infection (middle ear)

Eisenmenger syndrome

Embolic stroke (brain embolism)

Encephalitis

Essential thrombocythemia

Exercise headaches

Eyestrain

Farsightedness

Fever

Fibromuscular dysplasia

Fibromyalgia

Galactorrhea

Ganglioglioma

Genital herpes

Glioblastoma

Glioma

H1N1 flu (swine flu)

Hangovers

Hantavirus pulmonary syndrome

Headaches in children

Heat exhaustion

Heatstroke

Histoplasmosis

HIV/AIDS

Hydrocele

Hyperglycemia in diabetes

Hyperparathyroidism

Hyponatremia

Hypoparathyroidism

Impacted wisdom teeth

Influenza (flu)

Intermittent explosive disorder

Intracranial hematoma

Iron deficiency anemia

Jellyfish stings

Lead poisoning

Legionnaires' disease

Listeria infection

Lung cancer

Lupus

Lyme disease

Malaria

Meningitis

Mental illness

Migraine

Mononucleosis

Myelin oligodendrocyte glycoprotein antibody-associated disease (MOGAD)

Myocarditis

Nasal polyps

Nasopharyngeal carcinoma

Nearsightedness

NF2-related schwannomatosis (neurofibromatosis type 2)

Obstructive sleep apnea

Oligodendroglioma

Optic glioma

Paget's disease of bone

Parvovirus infection

Persistent post-concussive symptoms (Post-concussion syndrome)

Pheochromocytoma

Pineal gland tumor

Pituitary tumors and adenomas

Plague

Pneumonia

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.

Polycystic kidney disease

Polycythemia vera

Polymorphous light eruption

Post COVID syndrome

Postpartum preeclampsia

Preeclampsia

Premenstrual syndrome (PMS)

Primary CNS lymphoma

Primary mediastinal large B-cell lymphoma

Prolactinoma

Pseudotumor cerebri (idiopathic intracranial hypertension)

Pulmonary edema

Rabies

Radiation sickness

Recurrent breast cancer

Respiratory syncytial virus (RSV)

Rubella

Salmonella infection

Scarlet fever

Scarlet fever is a bacterial infection that causes a rash, fever and sore throat and usually affects children and adolescents.

Schwannomatosis

Serotonin syndrome

Shingles

Skull base tumors

Smallpox

Staph infections

Strep throat

Stroke

Sunburn

Takayasu's arteritis

Teen depression

Teeth grinding (bruxism)

Tension headache

Thunderclap headaches

TMJ disorders

Tonic-clonic (grand mal) seizure

Tonsillitis

Toxic shock syndrome

Traumatic brain injury

Trichinosis

Typhoid fever

Valley fever

Waldenstrom macroglobulinemia

West Nile virus

Whiplash

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July 11, 2026

See also

  1. ​Grade 4 brain cancer: what to expect, treatment options and support
  2. Acromegaly
  3. Acute sinusitis
  4. Acute sinusitis: Do over-the-counter treatments help?
  5. Alcohol intolerance
  6. Amenorrhea
  7. Anemia
  8. Aneurysms
  9. Antidepressants and alcohol: What's the concern?
  10. Antidepressants and weight gain: What causes it?
  11. Antidepressants: Can they stop working?
  12. Antidepressants: Get tips to cope with side effects
  13. Antidepressants: Selecting one that's right for you
  14. Antidepressants: Which cause the fewest sexual side effects?
  15. Aplastic anemia
  16. Arteriovenous malformation
  17. Aspergillosis
  18. Astigmatism
  19. Astrocytoma
  20. Atypical antidepressants
  21. Atypical teratoid rhabdoid tumor (ATRT)
  22. Bee sting
  23. Behcet disease
  24. Bell's palsy
  25. Brain aneurysm
  26. Brain AVM (arteriovenous malformation)
  27. Brain tumor
  28. Brain tumor FAQs
  29. Brainstem tumor
  30. Brucellosis
  31. Bump on the head: When is it a serious head injury?
  32. Carbon monoxide poisoning
  33. Carotid artery disease
  34. Central nervous system (CNS) lymphoma
  35. Central sleep apnea
  36. Chiari malformation
  37. Child abuse
  38. Chordoma
  39. Chronic sinusitis
  40. Clinical depression: What does that mean?
  41. Coarctation of the aorta
  42. Cold and flu viruses: How long can they live outside the body?
  43. Cold or allergy: Which is it?
  44. Cold remedies: What works, what doesn't, what can't hurt
  45. Cold sore
  46. Cold symptoms: Does drinking milk increase phlegm?
  47. Common cold
  48. Concussion
  49. Concussion in children: What are the symptoms?
  50. Concussion Recovery
  51. Concussion Telemedicine
  52. Cough headaches
  53. CPA tumor overview
  54. CPAP machines: Tips for avoiding 10 common problems
  55. Craniopharyngioma
  56. Craving and chewing ice: A sign of anemia?
  57. CSF leak (Cerebrospinal fluid leak)
  58. Cushing syndrome
  59. Delusional parasitosis
  60. Dengue fever
  61. Depression (major depressive disorder)
  62. Depression and anxiety: Can I have both?
  63. Depression and anxiety: Exercise eases symptoms
  64. Depression in women: Understanding the gender gap
  65. Diffuse large B-cell lymphoma
  66. Diffuse midline glioma (DMG)
  67. Ear infection (middle ear)
  68. Early HIV symptoms: What are they?
  69. Ehrlichiosis and anaplasmosis
  70. Eisenmenger syndrome
  71. Embolic stroke (brain embolism)
  72. Encephalitis
  73. Eyestrain
  74. Farsightedness
  75. Fever
  76. Fever treatment: Quick guide to treating a fever
  77. Fibromuscular dysplasia
  78. Fibromyalgia
  79. Flu masks
  80. Flu shot: Your best bet for avoiding influenza
  81. Flu vaccine: Safe for people with egg allergy?
  82. Galactorrhea
  83. Ganglioglioma
  84. Genital herpes
  85. Genital herpes: Can you get it from a toilet seat?
  86. Giant cell arteritis
  87. Glioblastoma
  88. Glioma
  89. Glioma vs. glioblastoma: What's the difference?
  90. H1N1 flu (swine flu)
  91. Hangovers
  92. Hantavirus pulmonary syndrome
  93. Headaches in children
  94. Headaches: Reduce stress to prevent the pain
  95. Heat exhaustion
  96. Heatstroke
  97. Hemangioblastoma
  98. Hemophilia
  99. High-dose flu vaccines: How are they different from other flu vaccines?
  100. Histoplasmosis
  101. HIV/AIDS
  102. Humidifiers: Ease skin, breathing symptoms
  103. Hyperglycemia in diabetes
  104. Hyperparathyroidism
  105. Hyponatremia
  106. Hypoparathyroidism
  107. Impacted wisdom teeth
  108. Influenza (flu)
  109. Infographic: Lung Cancer
  110. Intermittent explosive disorder
  111. Intervention: Help a loved one overcome addiction
  112. Intracranial hematoma
  113. Iron deficiency anemia
  114. Jellyfish stings
  115. Lead poisoning
  116. Listeria infection
  117. Living with Brain Tumors
  118. Living with Lupus
  119. Long Term Brain Cancer Survivor
  120. Low blood sodium in older adults: A concern?
  121. Lung cancer
  122. Lupus
  123. Lyme disease
  124. Malaria
  125. Male depression: Understanding the issues
  126. Managing Meningitis
  127. MAOIs and diet: Is it necessary to restrict tyramine?
  128. Marathon and the Heat
  129. Marijuana and depression: What's the link?
  130. Mayo Clinic Minute: Arteriovenous malformation or AVM
  131. Mayo Clinic Minute: Meningitis 101 for college students
  132. Mayo Clinic Minute: Prevent migraines with magnetic stimulation
  133. Mayo Clinic Minute: Weathering migraines
  134. Mayo Clinic Minute: What is an aneurysm?
  135. Mayo Clinic Minute: Why getting vaccinated for the flu is doubly important this season
  136. Mayo Clinic Minute: Will there be a Lyme disease vaccine for humans?
  137. Meningioma
  138. Meningitis
  139. Mental health providers: Tips on finding one
  140. Mental health: Overcoming the stigma of mental illness
  141. Mental illness
  142. Migraine
  143. Migraine FAQs
  144. Migraine medications and antidepressants: A risky mix?
  145. Migraine treatment: Can antidepressants help?
  146. Migraines and gastrointestinal problems: Is there a link?
  147. Migraines and Vertigo
  148. Migraines: Are they triggered by weather changes?
  149. Migraines: Simple steps to head off the pain
  150. Monoamine oxidase inhibitors (MAOIs)
  151. Mononucleosis
  152. Mononucleosis: Can it recur?
  153. Myelin oligodendrocyte glycoprotein antibody-associated disease (MOGAD)
  154. Myocarditis
  155. Nasal polyps
  156. Nasopharyngeal carcinoma
  157. Natural remedies for depression: Are they effective?
  158. Nearsightedness
  159. Neti pot: Can it clear my nose?
  160. New Test for Preeclampsia
  161. New Way to Fix Aneurysms
  162. NF2-related schwannomatosis (neurofibromatosis type 2)
  163. Nighttime panic attacks: What causes them?
  164. Obstructive sleep apnea
  165. Obstructive Sleep Apnea
  166. Obstructive sleep apnea: What happens?
  167. Occipital nerve stimulation: Effective migraine treatment?
  168. Ocular migraine: When to seek help
  169. Oligodendroglioma
  170. Paget's disease of bone
  171. Pain and depression: Is there a link?
  172. Parvovirus infection
  173. Persistent post-concussive symptoms (Post-concussion syndrome)
  174. Petroleum jelly: Safe for a dry nose?
  175. Pheochromocytoma
  176. Pineal gland tumor
  177. Pituitary tumors and adenomas
  178. Plague
  179. Plugged ears: What is the remedy?
  180. Pneumonia
  181. Polio
  182. Polycystic kidney disease
  183. Polycythemia vera
  184. Polymorphous light eruption
  185. Postpartum preeclampsia
  186. Preeclampsia
  187. Premenstrual dysphoric disorder
  188. Presbyopia
  189. Primary mediastinal large B-cell lymphoma
  190. Prolactinoma
  191. Pseudotumor cerebri (idiopathic intracranial hypertension)
  192. Punk Guitarist Survives Brain Tumor
  193. Rabies
  194. Radiation sickness
  195. Recurrent breast cancer
  196. Recurring strep throat: When is tonsillectomy useful?
  197. Respiratory syncytial virus (RSV)
  198. Rhabdomyolysis
  199. Rubella
  200. Salmonella infection
  201. Scarlet fever
  202. Schwannomatosis
  203. Self-care for the flu
  204. Serotonin and norepinephrine reuptake inhibitors (SNRIs)
  205. Serotonin syndrome
  206. Shingles
  207. Shingles and alcohol
  208. Shingles vaccine: Can I transmit the vaccine virus to others?
  209. Shingles vaccine: Should I get it?
  210. Sinus infection and toothache: Any connection?
  211. Skull base tumors
  212. Smallpox
  213. Staph infections
  214. Strep throat
  215. Stroke rehabilitation: What to expect as you recover
  216. Strokes FAQ Neurologist Robert D. Brown Jr., M.D., M.P.H., answers the most frequently asked questions about strokes.
  217. Sun damage
  218. Sunburn
  219. Takayasu's arteritis
  220. Teen depression
  221. Teeth grinding (bruxism)
  222. Tension headache
  223. Thermometers: Understand the options
  224. Thrombocytosis
  225. Thunderclap headaches
  226. TMJ disorders
  227. Tonsillitis
  228. Toxic shock syndrome
  229. Traumatic brain injury
  230. Treatment of parathyroid disease at Mayo Clinic
  231. Treatment-resistant depression
  232. Trichinosis
  233. Tricyclic antidepressants and tetracyclic antidepressants
  234. Typhoid fever
  235. Valley fever
  236. Video: 3 things you didn't know about cold sores
  237. Vitamin B-12 and depression: Are they related?
  238. Waldenstrom macroglobulinemia
  239. Walking pneumonia
  240. What is a brain tumor? A Mayo Clinic expert explains
  241. What is a migraine? A Mayo Clinic expert explains
  242. What is a stroke? A Mayo Clinic expert explains
  243. What is depression? A Mayo Clinic expert explains.
  244. What's the difference between H1N1 flu and influenza A?
  245. Which CPAP masks are best for you?
  246. Whiplash
  247. Wisdom teeth removal: When is it necessary?
  248. Zinc for colds: The final word?