Is a child's mouth ulcer caused by excessive internal heat or fever?

Children's oral ulcers may be caused by various factors, including excessive internal heat ("fire") and could also be related to fever. 1. Excessive internal heat ("fire") factors: If children frequently consume spicy or greasy foods, or lack nutrients such as vitamins B and C, it may lead to heat accumulation in the body that is difficult to expel, thus causing symptoms of excessive internal heat ("fire") and further resulting in oral ulcers. 2. Fever factors: Oral ulcers might also result from bacterial or viral infections within the mouth, such as herpes simplex stomatitis or herpangina. These conditions are relatively common in infants and young children. When pathogens invade, the child's immune system responds, causing an increase in body temperature and resulting in fever. In such cases, the fever may be an immune response triggered by oral ulcers. Parents are advised to observe whether other symptoms are present when they notice oral ulcers in their child and to seek timely medical examination to determine the cause and receive appropriate treatment.