Two-month-old babies with tearing and boogers in one eye may be caused by nasolacrimal duct obstruction, incomplete development of the tear ducts, bacterial conjunctivitis and so on. 1. Nasolacrimal duct obstruction: When the nasolacrimal duct of a two-month-old baby is obstructed, the tears accumulate in the tear sac, which can easily induce eye infections, resulting in tearing and boogers in the eyes. 2. Incomplete development of the tear ducts: If the tear ducts of two-month-old babies are incompletely developed, it will easily lead to poor tear drainage, the phenomenon of one eye running, and when there is an infection, it will lead to eye boogers in the eye. 3. Bacterial conjunctivitis: If a two-month-old baby’s eye suffers from bacterial conjunctivitis, it may be acute purulent conjunctivitis caused by gonococcus and meningococcus, etc., and yellowish-white discharge will appear in the eye, and there will also be tears. When a two-month-old baby has tearing and boogers in one eye, parents should take the baby to the hospital immediately to clarify the cause of the disease, and then carry out standardized treatment under the guidance of the doctor.