How do you cure a fever blister?

Unfortunately, there is no cure for fever blisters. You can use topical ointments to help dry the liquid that is responsible for spreading these unnattractive eyesores. Some good over the counter products are Herpecin-L, Campho-phenique, and Aveeno Cold sore and fever blister ointment. There is one option that you can practice to help prevent recurring fever blisters, you can take all natural L-Lysine tablets as a part of your daily routine and this helps your body defend itself against the virus that causes fever blisters. Very useful if you have to suffer with them over and over.