Introduction For some people, objects as common as rubber soled shoes, jewelry, or cleaning products can cause contact dermatitis, a type of skin reaction. Contact dermatitis appears as an itchy red rash on the skin. It develops when the skin…

Introduction Constipation refers to a change and decrease in bowel movements. Constipation can be very uncomfortable but is rarely linked to a serious medical condition. It can cause hard stools that are difficult and painful to pass. A poor diet,…

Introduction Conjunctivitis is an inflammation or infection of the conjunctiva. The conjunctiva is a thin film that covers the inside of your eyelids and the whites of your eyes. There are many causes and types of conjunctivitis. Some kinds are…

Computed tomography (CT) is a noninvasive procedure that is used to provide detailed views of the bones, blood vessels, brain, and dense tissues. With CT, cross-sectional images are produced in a series of slices similar to the slices that make…

Introduction Colds are a very common medical condition. There are over two hundred viruses that can cause the common cold. The viruses are easily transmitted from person to person. Coughing, sneezing, a sore throat, and a runny nose are typical…

Introduction A colonoscopy is a procedure that uses a scope to view the inside lining of the entire colon. A scope is a long thin tube with a light and a viewing instrument that sends images to a monitor. The…

Introduction Colon cancer is a common type of cancer. Colon cancer occurs when cells in the interior lining of the colon or large intestine grow abnormally and out of control. The exact cause of colon cancer is unknown. In most…

Introduction Colon and rectal polyps are small growths that project out from the inside lining of the large intestine or rectum. They usually are noncancerous and produce no symptoms. However, some polyps can turn into cancer. Polyps that turn into…

Introduction Coccydynia is an uncommon painful condition that originates from the coccyx, the tailbone at the end of the spine. Trauma and falls are the most frequent causes of coccydynia. In the vast majority of cases, nonsurgical treatment, such as…

Introduction Cluster headaches are named so because they occur in predictable patterns, often as regular as clockwork. They are one of the most painful types of headaches. Fortunately, treatments and medication can help reduce symptoms and the number of headache…