Find out more about these hardened areas of skin that often affect the feet and fingers. Try these self-care tips to make corns and calluses disappear.
Disease
Coronary artery disease
Know the warning signs of this common heart condition often caused by clogged, narrowed arteries and how lifestyle changes can lower your risk.
Disease
Coronavirus disease 2019 (COVID-19)
Coronavirus disease 2019 (COVID-19) is an illness caused by the virus SARS-CoV-2. Learn more about the symptoms, risks and ways to protect yourself.
Disease
Corticobasal degeneration (corticobasal syndrome)
Learn about this rare disease that affects brain cells. The disease can make it hard to speak, move and think.
Disease
Costochondritis
This chest wall pain, caused by inflammation, often improves on its own.
Disease
Cough headaches
Often triggered by coughing and other types of straining, these headaches can be harmless or signal another problem in the brain.
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
Craniopharyngioma
Learn more about this noncancerous tumor that forms near the brain's pituitary gland, including diagnosis and treatment options.
Disease
Craniosynostosis
In this condition, one or more of the flexible joints between the bone plates of a baby's skull close before the brain is fully formed.
Disease
Creutzfeldt-Jakob disease
Learn what can put someone at risk of developing this rare brain disorder that causes dementia.
Disease
Crohn's disease
Learn about symptoms and treatment for this debilitating, but treatable, digestive condition.
Disease
Croup
This upper airway infection makes it harder to breathe and causes a barking cough. It involves swelling around the voice box, windpipe and bronchial tubes.