Cheilitis is a relatively common oral inflammation in dentistry, with allergic cheilitis being a common type. Allergic cheilitis may occur when the patient's lips come into contact with certain allergenic substances, such as lipstick, lip balm, or medications. If these components cause discomfort to the patient's lips, it can trigger an allergy, leading to localized red rashes, peeling, and itching of the lips. There is also a type called chronic cheilitis, which generally arises from internal heat in the patient’s body, or a deficiency in certain vitamins and trace elements, leading to dry and cracked lips. Another type is seasonal cheilitis, which occurs during the dry climate of autumn and winter, causing the lips to become inflamed due to the dry weather. This type of cheilitis is generally mild and can be alleviated quickly by applying some anti-inflammatory ointment locally. Patients need not be overly concerned but should relax, paying more attention to daily dietary hygiene.