In children, drooling during sleep is even more common—and perfectly normal. Their oral muscles are still developing, and their brains are learning to coordinate the swallowing reflex automatically. As they grow and their jaw structure matures, the habit usually fades.
For adults, however, a sudden increase in drooling may sometimes indicate a change in oral health, muscle strength, or medication use. That’s why it’s always wise to mention it to a healthcare provider if it becomes excessive or is accompanied by other symptoms.
