The main causes of boogers in children’s nose include the following: 1. If there are more fine particles in the air, children will have more boogers after inhaling the air, so they should wear a mask or get out of the polluted air in time. 2. Children with allergic rhinitis will also have more boogers. 3. Because allergic rhinitis in children can cause allergic reactions causing edema in the nasal cavity, resulting in increased nasal stools, children can be given cetirizine to relieve.