The virus causes painful sores on your lips, gums,
tongue, roof
of your mouth, and inside your cheeks. Associated symptoms such as fever and muscle aches may also occur.
People contract herpes by touching infected saliva, mucous membranes, or skin.
Pain, burning, tingling, or itching occurs at the infection site before the sores appear. Then clusters of blisters erupt. These blisters break down rapidly and, when seen, appear as tiny, shallow, gray ulcers on a red base.