Since a few days my mouth is producing excessive amount of saliva. im 23 and fit. what could be the cause and is there any treatment. ?

Hypersalivation: Are you wearing anything in yourouth at night such as bleaching trays or night guard? These will cause hyper salivation. Are you having this problem every night? Many times when we are really tired, we fall asleep and our mouths stay open slightly. We awake with drool on our pillow. Maybe this is the case. Try and get more rest and see if that helps