The patient's recurrent lip crusting indicates a chronic, recurring condition. It is recommended to conduct relevant examinations to identify any potential irritants that could be causing this repeated lip inflammation. For example, prolonged exposure to sunlight can lead to actinic cheilitis, while living in a cold, dry environment might cause dehydration of the lip mucosa, leading to flaking and crusting. Additionally, some patients who do not consume fresh fruits and vegetables may lack vitamins, and frequently eating spicy and irritating foods can also lead to recurrent cheilitis. It is advised to eliminate these irritants and ensure proper moisturization of the lips.