What std cause you to have dark neck?

There are a few sexually transmitted diseases (STDs) that can cause skin darkening, including syphilis, human papillomavirus (HPV), and molluscum contagiosum. Syphilis is a bacterial infection that can cause a rash, including a dark rash on the neck. HPV is a viral infection that can cause genital warts, as well as skin tags and dark patches of skin. Molluscum contagiosum is a viral infection that causes small, pearly bumps on the skin, which can sometimes be dark in color. If you are experiencing any of these symptoms, it is important to see a doctor to get tested for STDs and receive treatment.