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Most people have headaches from time to time. But if you have a headache more days than not, you may be experiencing chronic daily headaches. The incessant nature of chronic daily headaches makes them among the most disabling headaches. Aggressive initial treatment and steady, long-term management may reduce pain and lead to fewer headaches. Symptoms Read more…

A chronic cough is more than just an annoyance. A chronic cough can ruin your sleep and leave you feeling exhausted. Severe cases of chronic cough can result in vomiting, lightheadedness, depression, even rib fractures. Chronic cough is defined as lasting eight weeks or longer in adults, four weeks in children. While it can sometimes Read more…

Chronic constipation is infrequent bowel movements or difficult passage of stools that persists for several weeks or longer. Constipation is generally described as having fewer than three bowel movements a week. Though occasional constipation is very common, some people experience chronic constipation that can interfere with their ability to go about their daily tasks. Chronic Read more…

Chordoma is a rare cancerous (malignant) primary bone tumor that usually occurs along the spine. Chordoma most often occurs in the base of the spine (sacrum) or in the base of the skull. Chordomas form from small remnants of the notochord, a coil of cells in the embryo that develops into the spinal cord. A Read more…

Chondrosarcoma is an uncommon type of cancer that begins in cartilage around bones. Chondrosarcoma most often affects adults older than 40. Though chondrosarcoma can affect any bone, it most often occurs in the hipbones and thighbones. Read more about bone cancer.

The cartilage under your kneecap is a natural shock absorber. Overuse, injury or other factors may lead to a condition known as chondromalacia patella (kon-droh-muh-LAY-shuh puh-TEL-uh) — a general term indicating damage to the cartilage under your kneecap. A more accurate term for chondromalacia patella is patellofemoral (puh-tel-o-FEM-uh-rul) pain syndrome. The most common symptom is Read more…

Cholestasis of pregnancy occurs in late pregnancy and triggers intense itching, usually on the hands and feet but often on many other parts of the body. Cholestasis of pregnancy can make you intensely uncomfortable but poses no long-term risk to an expectant mother. For a developing baby, however, cholestasis of pregnancy can be dangerous. Doctors Read more…

Cholera is a bacterial disease usually spread through contaminated water. Cholera causes severe diarrhea and dehydration. Left untreated, cholera can be fatal in a matter of hours, even in previously healthy people. Modern sewage and water treatment have virtually eliminated cholera in industrialized countries. The last major outbreak in the United States occurred in 1911. Read more…