Wounds or pimples on private parts, strange discharge, itching, back/stomach pain may be a Sexually Transmitted Infection (STI). But many STIs even have NO symptoms so go for tests if you had unprotected sex. ALL sex partners must be treated or you will get infected again. Get treated FAST because STIs increase risk of catching HIV and may also lead to serious illness and infertility. Many STIs are EASY to treat.
Attribution: Straight Talk Foundation