Cold sores (fever blisters) are painful blisters that form on or near the mouth.
The majority of people need treatment when they first develop cold sores. However, if this is not the first time or you have mild symptoms, you do not necessarily need treatment. Treatment can come in two forms:
To prevent frequent or recurrent cold sores, you can take antiviral medicine daily. However, the majority of people do not require prevention treatment. If you have blisters, avoid sharing personal items with others.
Avoid acidic foods and beverages such as tomatoes, oranges, and grapefruit to avoid exacerbating and worsening symptoms.