Infants with colds and tears in the eyes, mainly due to inflammation and stimulation caused by the blockage of the nasolacrimal duct. Parents can choose appropriate anti-infective drugs and eye drops under the guidance of the doctor to treat the child, and at the same time pay attention to whether the child has fever and other discomforts, and pay attention to the medication in time. The main reason why babies have tears in their eyes when they have a cold is that the nasolacrimal duct and the nasal mucosa are connected. When cold symptoms occur, due to bacteria and viruses entering the nasolacrimal duct, combined with conjunctivitis or upper respiratory tract infections, leading to swelling of the nasal mucosa or the nasolacrimal duct mucosa, there is a transient blockage or narrowing of the nasolacrimal duct, which results in the emergence of the symptom of tears in the eyes. Treatment 1, if the child’s eye secretion is small, just simple tears, parents can use saline under the guidance of the doctor to moisten, clean the nasal cavity, to be the nasal mucosal swelling disappears, the phenomenon of tears will stop; 2, if the tears accompanied by eye redness, increased secretion, parents can be under the guidance of the doctor to use Tobramycin eye drops eye drops, to prevent infection. Precautions after the baby cold, parents should feed the baby more warm water, eat more fresh vegetables, fruits; if there is a fever can be used to make the baby cool down; pay attention to maintain indoor ventilation, for the body to recover are helpful.