I had a cold sore that was treated w/valtrex & cured with in 4 days on the 5 day i still had a very small scab barely visible. is it still contagious?

Probably: Herpes virus may be shed even when there are no visible lesions. So a person who has herpes is always, potentially infectious. Wish you good health! - Have a diet rich in fresh vegetables, fruits, whole grains, milk and milk products, nuts, beans, legumes, lentils and small amounts of lean meats. Avoid saturated fats. Drink enough water daily, so that your urine is mostly colorless. Exercise at least 150 minutes/week and increase the intensity of exercise gradually. Do not use tobacco, alcohol, weed or street drugs in any form. Practice safe sex, if you have sex.

Cold sore.: Typically speaking, once the cold sore has scabbed over it would not longer be contagious.