What causes fever blisters on lips and how should they be treated?
Dear Sores, Many different types of fever blisters can occur around a person’s mouth, or on one’s lips and face. The most common types are canker sores and colds sores caused by the herpes simplex virus type I (HSV-1). Other rarer forms of mouth sores are caused by tuberculosis, syphilis, Vincent’s disease, Behcet’s syndrome, leukemia, anemia, or drug allergies. As canker sores and cold sores are the most common fever blisters, here’s some information on both. Canker sores are tiny, crater-like lesions inside of the mouth that can appear on or under the tongue or inside the cheeks, alone, or in a group. Though painful and irritating, cankers have not been proven to have a viral origin and they are not contagious or a sign of any other disease. It is not clear what causes canker sores to appear. They seem to be stress-related for some people, but stress can also be a side effect of the sores. Heredity may play a role, and some women find that they recur at the same time each month durin
