If you rub the inner corner of the affected eye (i.e., the inner canthus) in the direction of the nose with your finger in a top-to-bottom direction, you can feel a horizontal strip, which is the medial canthal ligament. Below the medial canthal ligament (i.e. deep side, deeper back if the child is sitting) is the lacrimal sac. Below the lacrimal sac (i.e., from the inner corner of the eye toward the nose) is the nasolacrimal duct. The purpose of massage is to clear the blocked nasolacrimal duct. How to massage the right eye: facing the child, use your right index finger or the fingertips of both thumbs (note that the nails should be cut short and trimmed round and smooth, so as not to hurt the child) to gently press with appropriate force inward (in the direction of the bridge of the nose), downward (in the direction of the nose) and deep (if the child is sitting, deep that is, backward). Note: If there is purulent discharge overflowing from the inner corner of the eye, it indicates inflammation of the tear sac, which needs to be swabbed away with a clean cotton swab, and antibiotic eye drops need to be ordered. Different eye drops, the specific usage is different, it is recommended to read the instructions. In addition, which hand and which finger to use when massaging, depending on habit. There is no requirement for this.