When this duct is blocked, tears back up into the sac, causing swelling and discharge. The goal of the massage is to create hydrostatic pressure to push the fluid through the blockage or "pop" open a membranous obstruction.
The goal of the massage is to create . By applying firm pressure to the lacrimal sac (where tears collect), you can sometimes "pop" open the thin membrane that is causing the obstruction, allowing tears to flow naturally again. Step-by-Step Massage Technique (Crigler Massage) Follow these steps to perform the massage safely at home: Blocked tear duct - Symptoms & causes - Mayo Clinic
Note: If you suspect a serious infection, do not massage the eye.