Waking up to a damp pillow isn’t always just about sleeping on your side.
For most people, occasional drooling during sleep is normal — especially if you’re lying on your stomach or deeply relaxed.
But if you’re consistently drooling, especially in the same direction every night, it might be more than just a sleep habit.
It could be a silent signal from your body — one that points to an underlying medical condition.
Take the story of Xiao Liang, a 25-year-old programmer in China.
Overworked.
Stressed.
Sleeping only in short bursts during lunch breaks.
He started noticing something strange: he was drooling a lot — and always to the right.
At first, he brushed it off as fatigue.
But when it didn’t stop — and he began feeling numbness in his face — he saw a doctor.
After a brain CT scan, he was diagnosed with early signs of a neurological issue — caught early, thanks to that one symptom: asymmetrical drooling.
His story isn’t unique.
Excessive or one-sided drooling during sleep can be linked to several serious conditions — some neurological, some digestive, some treatable.
Let’s explore the 6 diseases you should check for if you drool while sleeping more than usual.
🤕 1. Neurological Disorders (Like Stroke or Parkinson’s)
Why it happens:
