I had protected Vag. Sex and unprotected oral with an escort about 7-8 mnths ago. About 2 weeks later I developed a very itchy rash on both elbows. I also have a itchy spot on one knuckle. The areas get worse if I scratch them and it seems to spread a little wider. However if I put a steroid cream on them they will go away for a week or 2 but come back. Could this be syphilis.