herpes simplex
"I have lived 14 years with cold sores from HSV 1, spending $20/tube on Abreva and suffering from annual break outs, some worse than others, but all embarrassing and painful! I never thought to ask for an prescfription, but coincidentally had a cold sore on my lip when I went to see my OBGYN last year. She noticed it and wrote me an Rx for Zovirax cream, and I let it sit in my wallet for a couple months until I felt the tell-tale "tingling". This stuff really works, and if you apply it early enough, the sore won't even really form or blister and will completely disappear within 3-5 days. It's amazing, and totally worth it. Do yourself a favor and get it! It was only $30, and the tube is bigger than a tube of Abreva."