People with sleep apnea may breathe through their mouths, which can contribute to drooling.

Other warning signs include:

Loud, persistent snoring

Gasping or choking during sleep

Witnessed pauses in breathing

Morning headaches

Excessive daytime sleepiness

Difficulty concentrating

Waking with a dry mouth

Not everyone who drools or snores has sleep apnea. But if several of these symptoms occur together, it is worth discussing them with a healthcare professional.

Untreated obstructive sleep apnea can affect blood pressure, cardiovascular health, daytime alertness, and overall quality of life.

A sleep evaluation may be appropriate in people with significant symptoms.

4. Excessive Saliva Production

Sometimes the issue isn't that you are swallowing too little saliva—the body may actually be producing more.

Excessive saliva production, known medically as hypersalivation or sialorrhea, can occur for different reasons.

Certain medications may increase saliva production. Some gastrointestinal conditions, infections, oral problems, or neurological conditions can also affect saliva control.

Pregnancy can sometimes be associated with increased salivation as well.

If you suddenly begin producing significantly more saliva than usual, especially without an obvious explanation, it is worth considering whether something else has changed.

A new symptom deserves more attention than a lifelong mild tendency.

5. Certain Medications Can Increase Drooling

Medications can influence saliva production and swallowing.

Some medicines may increase salivation, while others may cause dry mouth. People taking several medications simultaneously can sometimes experience unexpected changes in saliva production.

If nighttime drooling started soon after beginning a new medication or changing the dosage of an existing one, speak with your doctor or pharmacist.