How long cold sore contagious? had a lesion just below lip line 6 days back. took oral anti virals and anti viral cream for 5 days. its a scar like skin now. no scab or anything. am i still shedding or healed?

Outbreaks are most infectious the first 2-3 days and probably rarely transmissible to other persons after 5-6 days, assuming healing is well underway. But it's still wise to avoid direct contact with other persons (kissing, oral sex) until healing is entirely complete -- intact skin, any scabs have dropped off, etc.

Cold sores are typically contagious for up to 15 days. From the moment of the first tingle to 15 days. The Mayo Clinic notes that cold sores are most contagious when oozing blisters are present, but you can still transmit the virus even if there is no active sore and that is why the 15 days.