The Bottom Line
Drooling while sleeping is fairly common and is normally not a cause for concern. If it becomes excessive, however, begins all-of-the-sudden, or is accompanied by other concerning symptoms, it is important that you consult your doctor. These could be signs that something else is going on that could be a threat to your health and vitality. At any rate, it could likely be reducing your quality of sleep, which is as important to your health as any other lifestyle factor.