Baby’s nose red, common causes include: environment too cold, trauma, upper respiratory tract infection. 1. Environmental cold: when the environmental temperature is too low, cold air stimulation will cause the baby nose red, accompanied by increased nasal discharge and other manifestations, generally improve the environmental temperature symptoms can be relieved, without special treatment. 2. Trauma: trauma bumps may lead to nasal wounds, redness, etc., not accompanied by bleeding, bruising, etc., usually without special treatment, 7-10 days can gradually recover. 3. Upper respiratory tract infection: accompanied by nasal discharge, nasal congestion, cough, cough phlegm, fever and other symptoms, due to nasal secretions, nose blowing and other stimuli leading to nasal redness. Baby’s nose red, there may be other reasons, it is recommended to go to the hospital in time to improve the examination to clarify the cause of the disease, under the guidance of the doctor to give targeted treatment or treatment.