Tears in two-month-old babies may be caused by incomplete development of nasolacrimal duct, chronic dacryocystitis, congenital tear duct obstruction and other reasons. 1. Incomplete development of nasolacrimal duct: two-month-old babies, because the nasolacrimal duct is not yet well developed, so the tears of the lacrimal gland can not be discharged from the lower nasal passage, and the phenomenon of reflux occurs, which results in the manifestation of watery eyes. 2. Chronic dacryocystitis: chronic dacryocystitis is a chronic inflammation of the lacrimal sac and nasolacrimal duct, patients are often accompanied by nasolacrimal duct stenosis, obstruction, tear retention in the lacrimal sac, in the early stage of the patient can appear in the performance of tear overflow. 3. Congenital lacrimal duct obstruction: if the child has congenital lacrimal duct obstruction, resulting in tears can not pass through the lacrimal system smoothly, thus appearing the performance of tearing. It is recommended that children with frequent tearing accompanied by other discomforts should consult a doctor to evaluate their condition and follow the doctor’s instructions for treatment.