Doctors are urging people not to ignore a surprisingly common habit that can happen while sleeping.
According to health experts, drooling during sleep may sometimes be linked to underlying health issues — especially if it starts suddenly or becomes frequent. While it can happen for harmless reasons like sleeping position or congestion, in some cases it may point to something more serious.
Medical professionals say excessive nighttime drooling can occasionally be associated with neurological conditions that affect muscle control and swallowing reflexes. These issues can cause saliva to build up rather than being swallowed naturally during sleep.
In some patients, this symptom has been observed alongside disorders that affect the brain and nervous system, including Parkinson’s disease, where muscle movement and reflexes gradually become impaired.
Doctors stress that drooling alone does not mean someone has a neurological illness. In many cases, it is caused by benign factors such as nasal congestion, allergies, sleep position, or certain medications.
However, experts say people should pay attention if the symptom appears suddenly or is accompanied by other changes like trouble swallowing, sleep disturbances, or unusual movements during sleep.
Researchers are also studying links between certain sleep disorders and neurological conditions, suggesting that changes during sleep could sometimes appear years before other symptoms develop.
Because of this, doctors recommend seeking medical advice if the issue becomes persistent or noticeably worse, as early evaluation can help identify whether an underlying condition needs treatment.
