Without a test, it is impossible to tell which virus is causing the problem. It really doesn't matter, because the causes, symptoms and treatments are the same. An outbreak of herpes simplex usually begins as a soreness or tingling of the skin.
Small bumps appear that later turn into blisters filled with fluid.
The blisters break within one day and then become sores that are covered with a yellowish dried crust. The sores can last up to two weeks. If the blisters are in or around the eyes, they may be painful and seep fluid. Usually the sores are gone by two weeks, but can sometimes last longer. The herpes simplex virus is spread by direct contact and the fluid within the blisters is very contagious.