My 5 year old son gets terrible sores, then turns to blisters, then pops, leaks and then they turn into open wounds. It happens EVERYWHERE on his body not just his legs, this has been happening for a very long time, they checked the fluid in one of the blisters and said there was no bacteria, but, no answers on what this is or what's going on, it's awful !! He is beginning to show large scars all over, they look like cigarette burns (They are not bug bites) I have pictures I would like to show you but don't know how to upload to you, I did upload a pic to medhelp on another attempt to find out what this is, under user name 'margetam' if that helps, what someone suggested as an answer didn't look like what he has. If I can email you a few pictures of the wounds and blisters please let me know, I have them available. My name is Jaime, I'm his mother.