Herpes is an infection caused by two different but closely related viruses — herpes simplex virus type 1 (HSV-1) or cold sores and herpes simplex virus type 2 (HSV-2) or genital herpes. Both are easy to catch. They have similar symptoms (blisters or sores) and both can occur on different parts of the body. When the infection is on the mouth, it is called oral herpes. When it is on or near the sex organs, it is called genital herpes. There is no cure for herpes. Treatments are available to speed up the healing of the genital sores.