When these occur on the face they are known as ‘cold sores’ and when they occur on the genitals they are called ‘genital herpes.’ However, both viruses can be caught on other parts of the body. The viruses are very similar and both can cause blisters or ulcers.
Genital herpes – the basics: Genital herpes is caused by two viruses called Herpes simplex, types 1 and 2.