Patients with cheilitis are advised not to expose themselves to the sun. The exact causes of cheilitis are not fully clear, but clinical doctors generally believe that certain external irritants are directly related to the onset of cheilitis. For example, stimuli from cold and dry climates or prolonged exposure to sunlight can lead to the occurrence of cheilitis and may also exacerbate the condition in patients. Therefore, patients with cheilitis are advised against sun exposure before it is clear which specific cause is responsible. Those suffering from cheilitis should first eliminate local irritants, such as frequent licking or biting of the lips, and maintain local moisture. This can be achieved by methods such as moist compresses to relieve dryness.