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
Diabetic neuropathy
High blood sugar can lead to nerve damage in feet and other areas of the body. Know the symptoms and how to take steps to prevent this diabetes complication.
Disease
Hyperglycemia in diabetes
Hyperglycemia in diabetes can occur for many reasons. Know the causes, symptoms and treatments of high blood sugar and when to get emergency help.
Disease
Cradle cap
Learn about the symptoms, treatments and home care tips for this short-lived type of seborrheic dermatitis that's common in infants.
Disease
Chilblains
Learn how to prevent and treat this seasonal skin condition that causes injury to unprotected skin of young women when it's cold but not freezing.
Disease
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.
Disease
Spider bites
Learn more about prevention, symptoms, complications and treatment of spider bites, which are usually harmless.
Disease
Dermatitis
Learn about the symptoms, causes and treatments of this itchy skin condition that affects children and adults, and about how moisturizers help prevent it.