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Lichen planus
Learn about the causes, symptoms and treatment of this condition that causes swelling and irritation in the skin, hair, nails, mouth and vagina.
HIV/AIDS
Learn more about this potentially life-threatening infection that spreads through blood, sex and childbirth. Know how to prevent and treat it.
Hemophilia
In this inherited disorder, the blood lacks one of several clot-forming proteins. The result is prolonged bleeding, which can be life-threatening.
Severe acute respiratory syndrome (SARS)
Learn about this contagious and sometimes fatal respiratory illness. The last known infection was reported in 2004.
Granuloma annulare
Learn about this painless skin condition mainly affecting young adults in which bumps form a ring. The rash can be long lasting or recur after treatment.
Vasculitis
An inflammation of the blood vessels, vasculitis may thicken and weaken blood vessel walls. If blood flow is restricted, organ damage can occur.
Glomerulonephritis
Learn about symptoms, causes and treatments for acute and chronic glomerulonephritis, a type of kidney inflammation.
Cold urticaria
Learn more about the symptoms and treatment of this allergic skin reaction caused by cold that most often affects young adults.
Henoch-Schonlein purpura
Learn about the symptoms, causes and treatment of this blood vessel disease, also called IgA vasculitis, that causes a purplish rash on the lower legs.
Peripheral neuropathy
Learn what may cause the prickling, tingling or numb sensations of nerve damage and how to prevent and treat this painful disorder.
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