Inflammation of the lips is mainly suffering from lip inflammation and allergy of the lips. Lip inflammation is divided into acute lip inflammation and chronic lip inflammation. The factors that lead to lip inflammation are cold, dryness, sun exposure and having bad lip licking and lip biting habits, and chronic inflammation of the lips mainly manifests as dry, peeling, chapped and eroded lips. The chronic inflammation of the lips is often prolonged and recurring, with swollen, itchy and painful lips. The treatment and prevention of lip inflammation begins with breaking bad habits such as licking the lips, biting the lips, tearing the skin of the lips with your hands, wearing a mask and applying lip balm when you go out, but do not apply hormone-containing creams on your own. Another major cause of lip inflammation is lip allergy, lip allergy to certain foods, drugs, cosmetics will cause rapid swelling of the lips in a short period of time. The first step in treatment is to isolate the suspected allergens, drink more water, and take desensitizing drugs such as paracetamol and loratadine if necessary.