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Disease

Anaphylaxis

Anaphylaxis, a severe allergic reaction, is an emergency. Learn who's at risk, what to watch for and what to do when it occurs.
Disease

Infectious diseases

Viruses, bacteria, fungi and parasites all can cause infections. Find out more about how to prevent and treat these conditions.
Disease

Tooth abscess

A bacterial infection at the tip of the tooth root usually occurs from an untreated dental cavity, an injury or prior dental work.
Disease

Creutzfeldt-Jakob disease

Learn what can put someone at risk of developing this rare brain disorder that causes dementia.
Disease

Brucellosis

Brucellosis is an infectious bacterial disease often spread via direct contact with infected animals or contaminated animal products.
Disease

Stomach polyps

These masses of cells that form on your stomach lining usually don't cause symptoms. Learn what causes them and when to be concerned.
Disease

CSF leak (Cerebrospinal fluid leak)

Cerebrospinal fluid leaks may start in the brain or spine, causing headaches, dizziness and other symptoms.
Disease

Benign brain tumor

Find out more about the different types, signs, symptoms and causes of benign brain tumors, which are growths of noncancerous cells in the brain.
Disease

Fecal incontinence

Learn about this common issue that causes some people to avoid social situations. Treatments are available.
Disease

Dementia

This group of symptoms with many causes affects memory, thinking and social abilities. Some symptoms may be reversible.
Disease

Lewy body dementia

This common dementia is caused by a buildup of proteins in the brain. It affects thinking, memory and movement.
Disease

Reactive arthritis

This joint pain is triggered by an infection in another part of the body — often the intestines, genitals or urinary tract.
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