Dry and cracked lips may be caused by bad habits, stomatitis, etc. It can be helped by improving habits, topical medications, oral medications, and other methods. 1. Bad habits: For people with bad habits such as drinking less water and enjoying spicy and stimulating foods, the likelihood of dry and cracked lips will increase. For this kind of patients, by increasing the frequency of daily drinking water, consuming more vitamin-rich fruits and vegetables, avoiding spicy and stimulating foods, quitting smoking and drinking, and paying attention to lip moisturizing care, can help treatment. 2. Keratitis: Malnutrition keratitis: Malnutrition may cause keratitis, which leads to dry and cracked lips. This type of patients can help to improve the symptoms by supplementing the appropriate nutrition (such as vitamins, folic acid, protein, etc.), topical rinsing chlorhexidine mouthwash to help remove the scabs, and the use of antibiotic ointment topical application of dry cracked areas. Infectious xerostomia: A variety of microbial infections may cause infectious xerostomia, which can lead to dry and cracked lips. Such patients can be treated with appropriate anti-infective treatments for different causative microorganisms. For example, antifungal ointments such as miconazole ointment, terbinafine ointment, and ciprofloxacin ointment can be used to help treat keratitis caused by fungal infections. Contact keratitis: Suspected allergies to medications, cosmetics, etc. may cause contact keratitis, which can lead to dry and cracked lips. Such patients should stop using allergy-causing products, take oral loratadine, and apply topical dexamethasone ointment to help treatment. It should be noted that the above medications need to be taken under the supervision of a physician.