Symptoms may go away on their own without treatment in 1 to 2 weeks.
Your health care provider can prescribe medicines to fight the virus. This is called antiviral medicine. It can help reduce pain and make your symptoms go away sooner. Medicines used to treat mouth sores include:
These medicines work best if you take them when you have warning signs of a mouth sore, before any blisters develop. If you get mouth sores frequently, you may need to take these medicines all the time.
Antiviral skin creams may also be used. However, they are expensive and often only shorten the outbreak by a few hours to a day.
The following steps can also help make you feel better:
Apply ice or a warm washcloth to the sores to help ease pain.
Wash the blister gently with germ-fighting (antiseptic) soap and water. This helps prevent spreading the virus to other body areas.
Avoid hot beverages, spicy and salty foods, and citrus.
Gargle with cool water or eat popsicles.
Rinse with salt water.
Take a pain reliever such as acetaminophen (Tylenol)..