A few days ago I noticed a small sore on my inner thigh. I figured it was from wearing tight jeans and the weather is hot and humid. I put triple antibiotic ointment on it and a bandaid. I've been keeping it clean and dry and covered (only becuse of where it's located if I didn't cover it I wouldn't be able to walk because it rubs) anyway, last night I was getting in the shower and it hurt more than usual so I looked and now there's an open sore still with blisters around it. It would appear that the blisters are filled with clear liquid. I've been with the same man for 2 years and neither of us have std's. I don't know what's it could be of if it can be treated at home.