Bumps, Blisters & Sores
Genital herpes and genital warts, like scabies and crabs can be spread through close skin to skin contact. Even when there are no visible lesions or bumps on the skin, these viruses can potentially be transmitted. Both genital warts and herpes can be transmitted without visible signs of infection.
The Herpes Simplex Virus
The herpes simplex virus produces blisters, rashes or sores, and is known as genital herpes, even though it can infect any part of the body. Symptoms usually appear within 20 days after infection, and common sites are the mouth, anus, buttocks, penis, scrotum, and, or any other part of the body that has come in contact with an infected person. Genital herpes remain in your body forever and can be treated but can never be cured.
Genital warts, technically called human papilloma virus, is thought to be one of the most common viral STIs. The warts can look like small blisters or bumps, and can affect the anus, scrotum, penis, and thighs. They are not usually painful and can be treated. Some types of HPV (there are something like 30 strains) can cause cancer. If you see or feel unusual bumps, go to your doctor for an exam, there is a topical cream available for treatment, but no cure.
Syphilis, like Chlamydia and gonorrhea, often does not have visible symptoms. About three weeks after you have unprotected sex with someone who has syphilis, you may notice a painless sore (called a 'chancre') on your penis, near your anus (ass, bum), or in your throat.
The most common means of detecting syphilis is through a blood test. Get regularly tested for syphilis if you have sex and if caught early it can be cured.