The phenomenon of tearing after a baby has a cold is mainly due to the blockage of the nasolacrimal duct caused by the infection, which needs to be treated for the primary cause and daily needs to protect the eyes. The main cause of a cold is usually an infection of the upper respiratory tract caused by a virus or bacteria, and the main symptoms include nasal congestion, runny nose, sneezing and sore throat. As the mucous membrane of the nasal cavity is edematous during a cold, it may compress the nasolacrimal duct in the nasal cavity, causing the baby’s eyes to water. Treatment 1, treatment of colds: In most cases, colds are caused by viral infections and are mainly treated symptomatically. It is recommended to let the baby drink more warm water, ensure sufficient rest, balanced diet, and improve the body immunity. At the same time, you should do a good job of personal protection, you can wear a mask when you go out to avoid the stimulation of physical and chemical factors such as wind blowing to relieve your baby’s symptoms. If necessary, anti-viral drugs such as ribavirin can also be used under the guidance of a doctor; 2. Protect the eyes: first of all, treatment can be carried out from the perspective of reducing the congestion and edema of the nasal mucosa, and pseudoxanthine drugs and anticholinergics can be used, thus reducing the secretions spread from the nasolacrimal duct to the eyes. Then you can choose suitable eye drops to protect the eyes, such as chloramphenicol drops, pay attention to basic hygiene in and around the eyes, avoid rubbing the eyes with both hands, avoid using unclean towels to wash the face, etc. Note that tearing is not a specific symptom of a baby’s cold, so if your baby is tearing for no reason, the presence of other physical discomfort should be considered under the premise of normal body temperature and you should seek medical attention promptly.