A clot in the brain can weaken the muscles that control swallowing, causing saliva to build up — especially on one side.
Seek immediate help if you notice: drooling on one side of the mouth, uneven facial expressions, speech trouble, or vision changes.

6. Atherosclerosis: a hidden danger in older adults

Blocked arteries can cut down the oxygen supply to the brain, weakening the facial muscles and making swallowing harder.
Pay extra attention if you have: high blood pressure, diabetes, or high cholesterol. Taking care of your heart health is key.

3 Simple Tips to Help Stop Drooling at Night

1. Adjust your sleeping position
Lying on your back helps keep your mouth closed better than sleeping on your side or stomach. Using a supportive pillow can help you stay in the right position.

2. Keep up with good oral hygiene
Brush thoroughly, floss, and use a good mouthwash. Even mild infections can throw off your saliva production.

3. Review your medications
Some meds can cause extra drooling. If you think your medicine might be the reason, talk to your doctor — but don’t stop or change any medication without medical advice.

In short

Drooling at night isn’t always something you should ignore. It can hint at dental, digestive, or neurological issues.
The good news is that in many cases, simple changes and natural remedies can make a big difference.

Stay aware of what your body is telling you — even while you’re asleep.