Nasal congestion in children may be caused by congenital developmental abnormalities of the nasal cavity, sinusitis, respiratory tract infections, and foreign bodies in the nasal cavity. 1. Congenital developmental abnormalities of the nasal cavity: children have a deviated septum, which is blocked by the deviation of the entire cartilage and bony tissues to one side of the nasal cavity, and the manifestation of nasal congestion will occur. 2. Sinusitis: children with sinusitis, can cause nasal mucosa congestion and edema, blocking the nasal cavity will have the performance of nasal congestion, persistent nasal congestion will worsen the condition, nasal mucosal hypertrophy, there will be persistent nasal congestion performance. 3. Respiratory tract infection: children with respiratory tract infection may lead to nasal mucosa congestion and edema, there is an increase in the phenomenon of secretion, secretion blockage of the nasal cavity will have nasal congestion. 4. Nasal foreign body: nasal cavity has a foreign body blocking one side of the nasal cavity, one side of the nasal cavity will be blocked airtight, the other side of the nasal cavity is airtight, children also have the feeling of nasal congestion. Children’s nasal congestion causes are more, should promptly seek medical attention to identify the causes, under the guidance of the doctor standardized treatment.