What causes mouth ulcers and high white blood cell count in children?

There is a certain association between oral ulcers and elevated white blood cell count in children: 1. Infection and inflammation: Oral ulcers may be caused by bacterial or viral infections, such as herpes simplex virus or enterovirus. When the body responds to these infections, white blood cells—part of the immune system—are activated and their numbers may increase to combat the pathogens. 2. Reduced immunity: When a child's immune system is weakened, they become more susceptible to bacterial or viral invasion, leading to oral ulcers. At the same time, white blood cell counts may rise as the body fights the infection. 3. Oral hygiene: Poor oral hygiene can promote bacterial growth in the mouth, contributing to oral ulcers. These bacteria may also stimulate the immune system, resulting in an increased white blood cell count. When these symptoms are observed, it is recommended to seek medical attention promptly to determine the underlying cause and initiate appropriate treatment.