Do herpes inside the mouth go through the same sages as herpes outside of the mouth (cold sores) such as blistering?

Herpes simplex: Yes. Lesions are similar whether on the skin or on mucous membranes.

Herpes simplex: is divided into two types: HSV type 1 and HSV type 2. Both of these conditions can affect your mouth or your genitals and can be spread via oral sex, but not trough clothing. There no cure for HSV infection and often stress is an aggravating factor. Cold sores generally clear up without treatment within 10-14 days.