I have cold sores around my mouth for more than a month now. During the first few days, I asked my doctor for Acyclovir; he prescribed Valtrex, 500 mg. once a day for 10 days. Didn't do the trick. I called the doctor's office again. Prescribed Valtrex again, 1k mg, taken every 12 hrs. I did that and didn't work. Yesterday, I felt tingling/ burning on the my lower lips, and this morning I looked in the mirror and blisters right below my lower lip. On top of this, I have small lesion that is not healing in the corner of my mouth. Please help. Thanks.