Transnasal lacrimal sac anastomosis has become the main procedure for treating nasolacrimal duct obstruction due to the advantages of less trauma, no scar on the face and higher success rate, but not everything is fine and done after the surgery, in fact, post-operative follow-up and medication is also very important. It is generally recommended to follow up one week after surgery. During the follow-up, the doctor will examine, treat and medicate the patient according to the patient’s condition, which includes: Tear Shu (tobramycin, dexamethasone eye drops) rinse once, it is recommended to rinse once every one to two days after surgery; nasal cavity cleaning: the dried scabs and pseudomembranes in the surgical area need to be cleared in time to prevent adhesions, and if the surgery for sinusitis was performed at the same time, the filling in the sinuses also needs to be cleared nasal medication: nasal rinsing, nasal spray hormone medication can be used to prevent the formation of granulation scar; wishing all patients with lacrimal obstruction “dry your tears and laugh at life”.