Mandibular advancement devices, which are mouthpieces used to help treat OSA, can also cause excessive production of saliva and, in turn, drooling while you sleep. Other symptoms of OSA include: ...

Thirst, like hunger, is usually pretty cut and dry. You feel thirsty—usually because you've been sweating a lot or not ...

There are many causes, and it can be difficult in any given person to be certain. Many mediations can cause excess salivation, such as clonozapam (Klonopin) and clozapine (Clozaril).

Saliva that tastes sour or metallic can be a sign of acid reflux or GERD, which causes stomach acid to flow back up into your throat, creating a bitter or sour taste once it mixes with your spit.

In very rare cases drooling can have some more serious health complications, adds Dr Patel: “Excess saliva can be aspirated into your lungs, putting you at risk of pneumonia.

The excess saliva can accumulate in the mouth and cause the feeling of excessive salivation. Women with hyperemesis gravidarum try to swallow less and hence spit more, ' explains Mootian.