<s>[INST] I had unprotected sex a year ago in july 2010. 4-6 months back , I used a hair removal cream on my pubic region and had allergic reaction. Little red scabies like spots developed on my pubic region and shaft of my penis. Is this dermatological disease or STI? [/INST] HI, thanks for using Chat Doctor There are different sexual transmitted infections. The most common are trachomas, chlamydia, gonorrhea, HIV, syphilis, herpes, hepatitis B. Herpes may present with a painful rash that starts as redness to the area which evolves to small water filled lesions that are also painful. If your lesion are painful that it is possible that they are herpetic. If they are not then unlikely herpes. The lesions that you are describing are not in keeping with any of the other above infections. I hope this helps </s>