Less often, HSV-1 can cause genital herpes infections through oral sexual contact. The genital sores caused by either virus look the same. Genital herpes is spread by direct contact with an infected person. Sexual intercourse and oral sex are the most common methods of spreading genital herpes. Furthermore, there is strong evidence that people with herpes can transmit infection even while their disease appears to be inactive and no sores can be seen.
Many people remember having an episode of genital herpes.
It is not clear whether these people never had an initial herpes outbreak or whether they never noticed a mild infection. They are contagious and may have additional outbreaks, nonetheless. Usually the blisters form first, then soon open to form ulcers. Herpes infections may be painless or slightly tender. In some people, however, the blisters or ulcers can be very tender and painful.