There are more clinical causes of herpes on the lips, which are seen in the following cases: 1, oral herpes simplex, which can also be induced when there is drug allergy, sun exposure, gastrointestinal dysfunction, and overexertion. Patients should pay attention to rest, maintain good habits, and can take anti-inflammatory drugs for treatment to improve the symptoms. 2. Stomatitis, caused by the presence of Candida infection or lack of trace elements, etc., can also occur when there is a lack of nutritional elements and excessive energy consumption in the body leading to a decrease in immunity, patients should actively supplement calcium, iron, zinc, vitamins and other trace elements, and should also pay attention to rest, avoid staying up late, eat foods containing 3. Herpes zoster, caused by the herpes zoster virus infection, patients need to carry out antiviral treatment, you can take oral acyclovir, vaxilovir, should also protect the blisters, avoid poking.