
Why do children develop mouth ulcers when they have a fever?
Disease description:
The child has a fever along with mouth ulcers, and is experiencing significant oral pain. We don't know what caused this and would like to ask what might be the reason?

The main causes of oral ulcers in children during fever include the following:
1. Infectious factors: When a child develops a fever, it is usually due to an infection caused by viruses or bacteria. These pathogens not only affect the body's temperature regulation center leading to fever, but they may also directly invade the oral mucosa, causing oral ulcers.
2. Decreased immunity: During fever, a child's immune system may be in an excited state while responding to infection, but overall immunity might decline. This makes the oral mucosa more susceptible to pathogen invasion, resulting in ulcers.
3. Associated symptoms: Certain diseases, such as oral herpes and hand-foot-mouth disease, often present with oral ulcers alongside fever.
Parents should closely monitor their child's oral condition when fever occurs and seek timely medical treatment.