Oral ulcers in children are a common oral mucosal disease. It takes some time to recover from lesions in the oral mucosa, and whatever method can only help promote the recovery of oral ulcers, but cannot achieve rapid healing. Children with severe oral ulcers are advised to seek medical attention for targeted treatment and pay attention to daily care to help promote wound healing. 1. local medication: gargles such as compound chlorhexidine gargle can be used under the guidance of a doctor to help relieve oral mucosal inflammation; lidocaine gel and compound benzocaine gel can be applied topically to help relieve pain; oral ulcer dispersion and watermelon cream can also be used topically. ulcer healing; 2. Systemic treatment: If children’s mouth ulcers are more serious or always recurring, you can also take oral immunomodulators and immune enhancers such as levamisole, as well as vitamin B, vitamin C and other drugs to supplement vitamins for systemic treatment under the guidance of a professional doctor after perfecting the examination. It helps to strengthen the body’s resistance and promote wound healing, and can also play a preventive role for recurrent mouth ulcers in children. In addition, if it is caused by thrush or hand, foot and mouth disease, the primary disease should also be treated. For example, patients with thrush can apply mycobacterium, fluconazole and other drugs under the guidance of a doctor, and patients with hand-foot-mouth disease can apply ribavirin intravenous drip at an early stage; 3, daily care: parents need to pay attention to keep the child’s mouth clean, such as children with symptoms of salivation, need to remove the secretions in a timely manner, so as not to aggravate the symptoms. If fever exists, physical cooling and medication should be used to relieve the symptoms. In addition, daily attention should be paid to avoid eating too hard, too hot and spicy stimulating food to avoid aggravating stimulation, and it is appropriate to eat warm and cool food rich in vitamins and other trace elements, eat more fruits and vegetables, drink more water; and adopt the correct chewing method, which can help protect the oral mucosa and help the recovery of mouth ulcers.