Herpes infections present 2-20 days after contact with an infected person. Small painful blisters form on a red base, then burst leaving shallow ulcers which scab over. In general, a first episode can last between 7-10 days. However, the virus that causes the infection moves to the nerve cells where it enters a resting state. Recurrences vary among individuals but usually occur close to the area of the first episode and are preceded by a tingling, burning, or itching sensation. Most people get type I infections from family members and close friends during childhood. Genital herpes is transmitted sexually. To avoid transmitting the herpes viruses, it is necessary to avoid contact with active lesions or areas in which tingling, burning, or itching occurs in a previously infected area. The herpes virus can be transmitted not only to others but also to uninfected body parts. For those with genital herpes, condoms may help reduce the risk of transmission, but do not fully protect, as the virus may be on non-covered areas.