Can mouth ulcers in children cause high fever?

In some cases, oral ulcers in children may cause high fever. This is mainly because oral ulcers can be caused by various factors, including but not limited to oral inflammation, infections, herpangina, and hand-foot-mouth disease. When such inflammation or infection is severe, toxins produced by pathogens may enter the bloodstream, triggering fever. Specifically, if a child's oral ulcers are caused by viral infections such as herpangina or hand-foot-mouth disease, the extensive replication of these viruses in the body may lead to oral ulcers accompanied by fever. Additionally, if oral ulcers are complicated by bacterial infections, such as acute ulcerative gingivostomatitis, bacterial invasion may lead to elevated white blood cell counts and disrupt the body's temperature regulation center, resulting in high fever. Parents should promptly take their child to see a doctor for accurate diagnosis and appropriate treatment.