why I do a lot of saliva when singing...

Spear

Does anyone know why:
when singing, I would like to know why I salivate a lot?

HuduVudu

To lubricate your vocal tract and vocal chords. It also helps clear mucus in the lower throat.

highmtn

You will have to remember to keep swallowing. If you fall behind while singing, you will have a bit too much in there.