When patients develop angular cheilitis, a black mark might be left after healing, typically due to hyperpigmentation, which usually improves gradually without a specific effective treatment. It is recommended that patients avoid frequently licking their lips, a habit that should be changed. Alternatively, patients could apply vitamin E capsules locally, which can protect the skin's stratum corneum. Patients should consume a light diet and avoid spicy and irritating foods. Generally, with time, the local discoloration will improve. Therefore, patients are advised not to worry excessively or panic, and avoid frequently touching the area with hands. It is recommended that patients adjust their mindset and develop good dietary and lifestyle habits. (Medication should be used under the guidance of a physician.)