Why does my nose start running every time I cry?

Answer 1

tears from eyes are drained by nasolacrimal duct which is situated at the inner angle of the eye.
it drains tears through puncta found at the edges of the eyelids then drains them inside the nose.
so when crying excess tears, excess drainage, runny nose

Answer 2

Excess tears from the tear ducts will sometimes drain into the sinus cavities.

Answer 3

Mr Garfield is correct