What causes excessive nasal discharge in children?

1. Physiological causes: Children's nasal passages and sinuses are not yet fully developed, and their ability to expel nasal discharge is still immature, making them prone to excessive nasal secretions (boogers). 2. Allergic rhinitis: This is a common type of rhinitis in children, causing congestion and swelling of the nasal mucosa along with increased secretions, leading to more nasal discharge. 3. Upper respiratory tract infections: Children's immune systems are not fully developed, making them susceptible to viral or bacterial infections that cause upper respiratory tract infections, which in turn increase nasal discharge.