Genital herpes is an STD that causes painful sores on and around the genitals. Members of the same virus family can cause fever blisters or cold sores on the mouth.
Oral sex can spread the virus.
After healing, the sores may reappear from time to time. A tingling or itching in the genital area may be experienced a few days to one week after having sex. A cluster of tiny blisters soon appears. The blisters burst and leave painful sores, which can last from two to four weeks. A fever and headaches may be associated with the first attack.