I dated a man that I found out later that he had unprotected sex with many sexual partners before. Soon after I dated him, I was diagnosed with Chlamydia. About a week after I first had unprotected sexual intercourse with him, I noticed something on my skin:
Dry red patches appear on the upper arms, upper legs, and side of the knees. The dry red patches (I'm not sure if they are rashes or not) are pretty much unnoticeable because they are painless, not itchy, and not raised. Before one almost disappears, another one comes up. There’ve been no more than 2 dry red patches at a time. Each patch lasts between 4 to 6 weeks. When the dry patches first come up, they’re light pink in color and have a size of a nickel, and they have no clear edges, and most of them are ovally round in shape. They are not only dry on the top layers of the skin, but when I touch and press the patches, I can see and feel that they are dry from very deep inside (and the redness doesn't temporarily go away when I press down on the patches). Then, the dry patches grow to the size of a quarter and become very red and have clear edges (Again, not all patches are round in shape). At the final stage, the dry patches expand to become bigger and bigger, and as they become bigger, the red color start to fade to a pink, then to light pink color, and the patches no longer have clear edges. As the dry patches become bigger and lighter, the centers of the patches are the lightest in color; and the centers are the first to turn back to my natural skin color and become less dry and finally become normal skin again. As the centers turn back to normal skin, the surrounding area also start to fade in color and become less dry, and finally, the whole patches start to disappear.
I wonder what disease I'm having, and it gets me worried now that I'm infected with STD. I don't know if this is related to another STD. I'll appreciate it very much for your opinion. Thank you very much.