Cold sores, also known as fever blisters, are small, painful blisters that form on or around the lips or mouth. They are caused by the herpes simplex virus and can be triggered by stress, illness, or sun exposure. Cold sores are highly contagious and can be spread through close contact with infected individuals.
There is no cure for cold sores, but antiviral medications can help reduce the severity and frequency of outbreaks. It is important to avoid close contact with others when experiencing an outbreak and to practice good hygiene to prevent the spread of the virus.