Type-1 herpes simplex virus causes over 95 percent of fever blisters, according to the National Institute of Dental and Craniofacial Research. Once infected with the virus, it stays with you for life. It is dormant in 90 percent of those afflicted until a trigger occurs to set off an outbreak.

A sore chest is a common side effect of a chronic cough. Coughing is the body’s way of clearing the throat and keeping mucus from building-up in the chest.

Cold sores are common, highly contagious skin lesions triggered by infection with herpes simplex virus type 1, also called HSV-1. They differ from common non-contagious skin lesions called canker sores. Taking vitamin B-12 will not shorten the duration of a cold sore outbreak.

Cold sores are caused by the herpes simplex 1 virus, which people usually catch in childhood or early adulthood, says the American Dental Association. The first outbreak may cause fever and mouth ulcers and some people go on to develop cold sores in later life.

Cold sores, also known as fever blisters, manifest themselves on the outside of our bodies, but are really an internal problem. They are caused by a virus called herpes simplex and are usually activated by fever, stress, trauma and intense exposure to the sun.

Swelling is a prominent feature of all fever blisters. In the June 9, 2008 edition of “Archives of Internal Medicine,” Northeastern Ohio University dermatologist Dr. Christina Cernik explains that mild swelling precedes the appearance of a fever blister.

Cold sores, also called fever blisters, are small, fluid-filled blisters on a raised, red area typically around the mouth. Exposure to the herpes simplex virus causes cold sores to appear, and there is no cure for the virus.

Cold sores -- or fever blisters -- are fluid-filled lesions found on the mouth, nose, chin and fingers that are caused as the result of the herpes simplex type one infection. These lesions are contagious and generally take two to three weeks to heal.

Salt is not just useful for flavoring food, but has over 14,000 other uses, according to the Salt Institute. Salt draws out fluid and moisture, and also prevents bacteria from growing. Because of these functions, applying salt to a fever blister may assist in the process of healing a fever blister.