Genital herpes is infected through simplex virus of "Herpes" (HSV), and there are 2 types of this virus: HSV-1 and HSV-2. Most common, and many infections are caused due to HSV-2, while HSV-1 is usual cause of most people called "fever blisters" around and in mouth can also be transmitted from one person to another through kissing. HSV-1 can be caused genital through oral sex contact.

Genital sores are caused by the virus look same. It is spread by the direct contact with infected person and sexual intercourse, oral sex are most common way of spreading genital herpes.

People having this virus may spread disease even if they don't realize about what infection they have. There is strong evidence that the people with herpes can also transmit infection while disease appears to be inactive and having no sores that can be seen. Signs of genital herpes tend to develop in 3 or 7 days of skin contact between 2 persons with infected person.

Infection looks like small ulcer or blister on genital. Each ulcer of blister is typically having only 1 to 3 millimeters in size and ulcer or blister ten to be into grouped, infection of herpes may be painless or tender slightly.