Genital Herpes simplex

Genital herpes is a viral infection caused by the herpes simplex virus (HSV). There are two HSV types: type 1 and type 2. Type 2 is most commonly associated with genital infection. Type 1 has also been found to cause genital infection but is more commonly associated with oral herpes (‘cold sores’).

Genital herpes is common in Ireland. It is mostly diagnosed in young women.

For information, advice and support on sexual health visit HSE-sexual health services

1,898 cases notified in 2025

36.9 the national notification rate per 100,000 population.

Last updated: 9 June 2026