When an infant has a red and swollen throat, first observe the overall condition. If the infant is in good spirits, plays as usual, swallows milk and water smoothly, and has no suspected swallowing difficulties or painful swallowing, the problem is not serious and does not require special treatment. If some children have obvious sore throat, difficulty in eating, refusal of food, salivation, etc., they can use the spray or rehabilitation solution for local oral care to promote the recovery of inflammation. At the same time, we need to observe whether there are other accompanying symptoms such as fever and cough, and if necessary, we need to do blood routine, C-reactive protein and other related tests to determine the causative agent, determine the severity of the infection, and carry out anti-infection treatment as appropriate.