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

Antiphospholipid syndrome

Antiphospholipid syndrome is a rare disorder in which your immune system attacks certain blood proteins, creating clotting abnormalities that can cause stroke and pregnancy complications.

Aplastic anemia

Arteriovenous malformation

Aspergillosis

Astigmatism

Bee sting

Behcet's disease

Bell's palsy

Brain aneurysm

Brain AVM

Brain tumor

Brucellosis

Bruxism (teeth grinding)

Carbon monoxide poisoning

Carotid artery disease

Chagas disease

Chiari malformation

Child abuse

Chronic sinusitis

Coarctation of the aorta

Cold sore

Common cold

Concussion

Concussions can be serious injuries that need sufficient time to heal.

Convergence insufficiency

 

Cough headaches

Cushing syndrome

Dehydration

Dengue fever

Depression

Ear infection (middle ear)

Ebola virus and Marburg virus

Ehrlichiosis

Eisenmenger syndrome

Encephalitis

Encephalitis is inflammation of the brain usually caused by a viral infection. Severe cases can cause brain damage, even death.

Essential thrombocythemia

Exercise headaches

External compression headaches

Eyestrain

Farsightedness

Fever

Don't be in a hurry to treat a low-grade fever — it's probably helping your body fight infection. High or lasting fevers may need medical attention.

Fibromuscular dysplasia

Fibromyalgia

Fatigue and widespread pain are common with fibromyalgia, a condition affecting mainly women. Treatment often focuses on managing symptoms with medication and self-care.

Galactorrhea

Genital herpes

Giant cell arteritis

Glioma

Grand mal seizure

Hangovers

Hantavirus pulmonary syndrome

Headaches in children

Heat exhaustion

Heatstroke

Hemophilia

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

Most people exposed to listeria don't become ill. But for those at risk of a listeria infection — a foodborne illness — the consequences can be severe.

Lung cancer

Lupus

Lyme disease

Malaria

Meningioma

Meningitis

Mental illness

Migraine

Mononucleosis

Myocarditis

Naegleria infection

Nasal polyps

Nasopharyngeal carcinoma

Nearsightedness

Paget's disease of bone

Panic attacks and panic disorder

Parvovirus infection

Pheochromocytoma

Pituitary tumors

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

Polycythemia vera is a rare blood disorder in which a person's bone marrow makes too many blood cells.

Polymorphous light eruption

Polymorphous light eruption is a sun-induced skin rash affecting people who develop a sensitivity to sunlight.

Post-concussion syndrome

Postpartum preeclampsia

Preeclampsia

Premenstrual syndrome (PMS)

Presbyopia

Prolactinoma

Pseudotumor cerebri

Pulmonary edema

Q fever

Rabies

Radiation sickness

Recurrent breast cancer

Respiratory syncytial virus (RSV)

Rocky Mountain spotted fever

Rubella

Salmonella infection

Salmonella infection will cause only diarrhea and stomach pain in some people, but for infants and immunocompromised people, this bacterial illness can cause life-threatening complications.

Scarlet fever

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

Serotonin syndrome

Serotonin syndrome — caused by mixing some antidepressants and other medications — can be life-threatening if left untreated.

Shingles

Sleep apnea

Sleep apnea, central

Sleep apnea, obstructive

Smallpox

Staph infections

Strep throat

Stroke

Sunburn: Soothing solutions

Swine flu (H1N1 flu)

Takayasu's arteritis

Teen depression

Tension headache

Thrombocytosis

Thunderclap headaches

TMJ disorders

Tonsillitis

Toxic shock syndrome

Traumatic brain injury

While mild traumatic brain injury generally results in few long-term problems, more severe injury can cause several physical, emotional, behavioral, communication and cognitive problems.

Trichinosis

Tularemia

Typhoid fever

Valley fever

West Nile virus

Whiplash

Yellow fever

Zika virus disease

May 04, 2016