In cases of angular cheilitis in children, it generally appears during the acute phase, especially if the child consumes spicy foods. Secondly, a deficiency in vitamins can also cause angular cheilitis. At this point, it is appropriate to supplement with vitamin B and vitamin C, and enhance care by maintaining oral cleanliness, drinking plenty of water, and favoring mild or cool liquid diets to avoid irritating foods. Additionally, topical treatments like watermelon frost and Xinnei San can be sprayed on the affected area, and for severe pain, lidocaine can be applied topically. If the child has a fever or other underlying illness, treatment should focus on the primary disease. Furthermore, it is also important to ensure the child's diet includes plenty of vegetables and fruits, which are rich in vitamins B and C.