A fever blister or cold sore is a fluid-filled, painful blister.

The infection from the virus erupts as small painful blisters on the usually on the outside of your lips, or the mouth area.

Fever Blisters can form on other parts of your body such as on your fingers. This is quite uncommon, but it does happen. At one time, my mother-in-law had one on her ear.

Oral herpes, or Herpes Simplex virus, is very common. More than 60% of Americans have had a fever blister or cold sore at one time or another, according to the Gale Encyclopedia of Medicine, and 25% reoccur. Canker sores or mouth ulcers are also a form of the virus.

The herpes virus can be spread to anyone by direct contact. A person is most contagious when the blister first appears and when the scab forms at the end. So, be sure to always wash your hands.

There are several causes that seem to bring on a fever blister/cold sore. Exposure to the sun, especially for several hours, always triggered a fever blister for me growing up.

I learned, the hard way, to always wear sunscreen on my lips while out in the sun for long periods of time.

Also stress, an illness such as a cold, certain types of diet, a fever or during a womans menstruation can cause an outbreak.

A fever blister starts out as a tender, tingling or burning sensation on your lip, or other area affected. (On my finger I could see tiny blistery circles under the skin that were very tender) Within a day or two a small blister will develop that grows larger, as did with my finger, and sometimes spreads. The puffy fluid-filled blister will be tender, very sore and embarrassing, too.

Lets look at some Home Remedies that you can use to get rid of those awful fever blisters: