What is the situation when a newborn's right eye is tearing and has discharge?

Patient's question:

Hello, the newborn's right eye is tearing and has discharge. How is it due to heat? Previous treatment history and effectiveness: Currently, no visit has been made. What kind of help is desired: Provide treatment methods

Doctor's answer:

If it's caused by excessive heat, why isn't the left eye affected the same way? Therefore, it's not due to excessive heat. It should be considered whether there might be a possibility of dacryocystitis or lacrimal duct obstruction.
Recommendation: It is suggested to first perform a lacrimal sac massage on the child. The method is: use the thumb to gently press from the inner corner of the eye along the bridge of the nose upward towards the side of the nose, five times a day, with five presses each time. It is best to apply eye drops first, then perform the massage, so that the eye drops can be absorbed into the lacrimal sac. It is vaguely remembered that the fingernails must be trimmed clean.
If there is no effect after the lacrimal sac massage, it is recommended to undergo a lacrimal duct probing procedure. The best time for this is when the child is three months old, as at this age, the lacrimal puncta are sufficiently large, making it easier to clean and probe, and the child's resistance is not strong. If the child is older and resists more strongly, it will be more difficult to perform the probing.