Herpes, cold sore, pimple, or something else, what's wrong?

Can't diagnose. Without seeing it. Cold sores are painful liquid filled blisters that can occur on the lips, roof of the mouth or the gums which are caused by the herpes simplex virus (hsv-1). Tingling ;/or pain can herald the oncoming of cold sore 1 to 2 days prior to eruption.