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.
Disease
Cancer
Find out the basics about cancer, including symptoms, causes and treatments. Learn steps you can take to prevent cancer.
Disease
Hearing loss
Age- and noise-related hearing loss are common and can affect quality of life. But many treatments are available.
Disease
Lung cancer
Learn about the symptoms, diagnosis and treatment for this deadly form of cancer.
Disease
Sudden cardiac arrest
This medical emergency involves sudden loss of all heart activity. Learn how fast, appropriate care may help prevent death.
Disease
Constipation in children
Learn what could cause constipation in your child, what you can do to prevent it and treatments that will get the bowel moving again.
Disease
Growing pains
Learn about this common condition involving leg pain in children, including growing pain symptoms and how to ease discomfort.
Disease
Metachromatic leukodystrophy
This rare genetic disorder causes fatty substances (sulfatides) to build up in your brain and nervous system, causing progressive loss of nerve function.
Disease
Angelman syndrome
Learn about this genetic disorder that causes developmental delays, problems with speech and other symptoms.
Disease
Chronic granulomatous disease
Learn about this inherited disease, usually diagnosed in childhood, that makes it difficult for your body to fight infections.