Why do our eyes water if we eat a lot of chillies?

Why do our eyes water if we eat a lot of chillies? :

Why do our eyes water if we eat a lot of chillies?

Chillies contain a substance called capsaicin. The red colour of the chilly (after it gets ripe) is due to carotene. The capsaicin causes the eyes to water as it stimulates the mucosal and epithelial membranes of the nose.