Possibly a medication side-effect? I don't know. I think the best thing would be to have this checked out by a medical professional. A GP may well refer you to a dermatologist.

At one point I was put on Lamictal. A few weeks later I developed a rash. (I knew nothing of Lamictal Rash.) My GP recognized what was going on & sent me upstairs to a dermatologist right away. She called my pdoc & they took me off the Lamictal immediately.

There was another medication I was put on at one point several years prior to the Lamictal incident. The name of that medication also started with an "L". (I don't recall what the actual name was.) But shortly after I began taking that I developed little red pin-prick type dots all over my calves. So I was taken off of that med too. After having those two incidents I joked that I couldn't take any medication that started with the letter "L".

Hope you're able to resolve this asap.