The name herpes is derived from Latin and Greek and means group of small blisters. It is caused by an infection with the herpes simplex virus or a reactivation of viruses persistant in ganglia. Viruses are transmitted by smear or droplet infection. More than 95% of the population are already infected. The first symptoms are itching and an unpleasant feeling of tension, the blisters develop on a reddened ground. After 8 to 10 days scabs form and the blisters heal without scars. Regional lymph nodes can be swollen and painful.