Avatar universal

Random blister turned to like a sore like scab?

Ok so a few weeks ago I developed this clear water fill blister just above my left knee.( Mind you, I have edema in my right leg. Not my left.) The blister eventually drained then developed this 1mm in diameter and maybe like 1/10 of mm deep - sized sore. It looks like someone too like an end of a mechanical pencil eraser and drilled it into my skin and then after hours of doing that this sore developed. Only I wish I could say that happened because then I would know why this blister has caused this. It won’t heal. It develops pus under it but just around the edges. Leaving any time I try to get the infection out it’s not getting worse or any better. It still the same size as it was two weeks ago. Can anyone explain this? I have never had a blister do this and if it did it was on my ankle when I was wearing shoes a lot and it still healed within a few days.  Help please. I’m 30 yrs old and female. I do have psoriasis on my scalp and tinea versicolor (not ringworm)  on my back.
1 Responses
Sort by: Helpful Oldest Newest
Avatar universal
Also I haven’t had sex in three years. So std not likely.
Helpful - 0
Have an Answer?

You are reading content posted in the Dermatology Community

Top Dermatology Answerers
Learn About Top Answerers
Didn't find the answer you were looking for?
Ask a question
Popular Resources
Learn to identify and prevent bites from summer’s most common pests.
Doctors argue for legislation to curb this dangerous teen trend in the latest Missouri Medicine report.
10 ways to keep your skin healthy all winter long
How to get rid of lumpy fat on your arms, hips, thighs and bottom
Diet “do’s” and “don’ts” for healthy, radiant skin.
Images of rashes caused by common skin conditions