You may have a deviated septum that is causing you to drool at night.
A deviated septum is when the center part on the inside of your nose is not lined up in the middle. This can cause you to feel like you have a stuffy nose & make it harder to breathe through your nose. Instead you breathe out of your mouth, causing you to drool at night. Snoring is also a sign. It could also be allergies
. See dr.
Answer assisted by Nicole Bressler, Medical Student