 [ Symptoms ] a rash is appearing all over my body started upper arms then back now penis concerned because i had unprotected sex concerned about hiv [ Disease ] it is not possible to determine the nature of a rash based on a vague description so you will need to see a medical provider so you can have this all over rash properly examined diagnosed and treated since you are concerned that this could be a consequence of unprotected sex seeing a medical provider is even more important if necessary the medical provider can test you for hiv and other sexually transmitted diseases you should get tested but you might just have dry skin this is very common as far as the penis is concerned you should use a creme called man1 man oil it is the best penis skin moisturizer around and will keep things in good shape down there i have used it for years and i love it good luck