Oral herpes has the following categories: 1. Herpes simplex is manifested as herpes simplex stomatitis. The oral mucosa is congested and edematous in the first stage, after which small, flaky blisters appear, similar to the size of a pinhead, with thin and transparent walls, which can easily form ulcers after breaking, and small blisters can form large ulcers after rupture, with secondary infection, and similar damage to the lips and perioral area, followed by crusting. 2, oral herpes zoster, where the patient has scattered, unevenly edged herpes at the oral mucosa The patient’s mouth is covered with a yellow pseudomembrane and the blisters can fuse into large blisters with tight walls and gradually become bloody or purulent, with crusting after 1-2 weeks. 3, hand, foot and mouth disease, the patient has scattered herpes in the mouth and a strong sense of pain.