OK so... I've been tested for all std's it all came back negative!! But yet I keep getting re occurring blister like things on my right cheek kind of close to mouth! Its always just one and it goes away in about a week then another one pops up like a week or 2 later!! and it usually leaves visible scars!! I've looked at pictures of oral herpes simplex online and my condition looks nothing like it and they never appear on lips!! Plllllleeeaassse let me know of what this could be... what causes it... and how to treat it! Its driving me insane!! THANK YOU!!