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Cold sores are small blisters around the mouth, caused by the herpes simplex virus. They are sometimes called fever blisters. The most common strain of the virus causing cold sores is herpes simplex virus 1. It can be spread by kissing or sharing eating utensils or even sharing towels.

Detailed information on calluses and corns.

This chart shows some common bacterial skin infections and their treatments.

Detailed information on the most common types of rosacea, including prerosacea, vascular rosacea, inflammatory rosacea, and rhinophyma.

Detailed information on scabies, including symptoms, diagnosis, and treatment.

Here is detailed information on seborrheic dermatitis, including symptoms, diagnosis, and treatment.

Celiac disease is a long-term digestive problem that hurts your small intestine. You may have celiac disease if you are allergic to gluten.

Constipation is not being able to have bowel movements often enough. It can cause pain and other symptoms. Learn more about the causes, tests, and treatments for this common GI (gastrointestinal) problem.

Crohn’s disease is part of a group of diseases known as inflammatory bowel disease or IBD.