Question
A three-year-old child has recently been experiencing an excessive amount of tear secretion, and the parents are confused about whether they need to use eye drops.
Answer
There is a channel between the eye and the nose called the nasolacrimal duct, which primarily functions to drain excess tears from the eyes into the nasal cavity. Normally, the eyes continuously secrete tears to moisten the eyeball, and during crying, a large amount of tears will flow out directly, with many tears also entering the nasal cavity, similar to a runny nose. If a child exhibits excessive tear production, it is recommended to visit a hospital for a check-up to confirm whether there are any serious issues.