If the symptoms of herpes appear at the corners of the mouth, you first need to identify the specific cause and then determine the appropriate treatment plan. This situation is usually caused by the herpes simplex virus infection, so you can use antiviral drugs for treatment, such as the external application of acyclovir cream, but also pay attention to supplemental vitamin C, you can directly take oral vitamin C, but also usually eat more fresh vegetables and fruits rich in vitamin C, such as tomatoes, kiwi, etc., but also pay attention to local cleanliness and hygiene, avoid eating spicy and stimulating food The condition may also be due to allergies. This situation may also be caused by allergies, you need to choose anti-allergy drugs for treatment, such as cyproheptadine, loratadine and other antihistamine drugs.