If a baby has redness and swelling inside the nose, it is considered to be caused by an upper respiratory tract infection. When a patient develops an upper respiratory tract infection, the mucous membrane of the nasal cavity becomes congested and swollen. This condition is considered to be caused by bacterial or viral infections, and the patient will also have varying degrees of nasal congestion. Depending on the severity of the symptoms, anti-inflammatory or antiviral medications can be used as appropriate. It is advisable to do routine blood tests before using drugs, which can determine whether the infection is bacterial or viral and help in the accurate clinical use of drugs. The nasal cavity can be flushed with physiological seawater, which is also helpful for the recovery of local inflammation.