Fever Blister Information
If you've ever had a fever blister, you're not alone. Also known as cold sores, fever blisters are an extremely common condition of the mouth. They are caused by an infection with the herpes simplex virus. They typically occur outside the mouth on the lips, cheeks, chin, or in the nostrils. Contrary to what you may have heard, you do not need a cold or fever to get the condition.
Fever blisters go away on their own. However, for people who get them frequently, medications are available to reduce symptoms and speed healing.