When patients develop oral inflammation during the summer, it is generally considered that it might be due to sunburns, as patients may neglect lip care and protection while going out in the summer, leading to intense ultraviolet radiation which could cause local sunburns. Since the skin on the lips is delicate and cannot withstand strong external stimuli, it is crucial for patients with summer angular cheilitis to pay attention to sun protection. Additionally, the occurrence of angular cheilitis might be due to inappropriate dietary habits, which could lead to poor nutrition and a lack of vitamins, potentially resulting in sores at the corners of the mouth. Some cases might be due to "internal heat", so it is recommended that patients maintain a light diet.