Hello, Welcome to HCM, Oral herpes is an infection of the lips, mouth, or gums due to the herpes simplex virus 1. It causes small, painful blisters commonly called cold sores or fever blisters. After the first infection, the virus becomes dormant in the nerve tissues in the face. Sometimes the virus reactivates causing cold sores. Symptoms may go away on their own without treatment in 1 to 2 weeks For your symptoms I would suggest you to follow 1.Apply ice or a warm cloth to the sores which help to ease pain. 2.Wash the blister gently with antiseptic. 3.Avoid hot beverages, spicy and salty foods, and citrus. 4.Take a pain reliever such as acetaminophen (Tylenol) 5.Anti viral like Valacyclovir can be taken when you have warning signs of a mouth sore, before any blisters develop. Thank you.