Swollen mouth generally refers to the swelling of the lip area, there are a variety of reasons, such as trauma, infection and allergies, etc., need to target the choice of swelling methods. 1. trauma: such as due to external impact or eating some sharp, rough food led to localized damage to the lips, may lead to the mouth congestion and swelling of the situation, at this time you can through the ice patients to help reduce swelling. 2. Infection: such as herpes simplex virus infection, can cause inflammatory edema of the lip area, at this time you can take oral acyclovir tablets, vasiclovir hydrochloride tablets and other antiviral drugs and topical human interferon α2b gel and other ways to help reduce swelling. 3. Allergy: When eating or contacting allergens cause allergic reactions, mouth swelling can also occur, at this time you can take oral cetirizine hydrochloride tablets, loratadine tablets and other drugs to fight allergies and improve symptoms. All of the above drugs should be used under the guidance of a professional doctor, and it is recommended that people with swollen mouths consult a professional doctor in time for diagnosis and treatment.