Where does human saliva come from?
The process of salivation is controlled by the autonomic nervous system, so the process of salivation is involuntary, like the heartbeat.
The glands in the mouth that secrete saliva are the salivary glands, which can be divided into major salivary glands and minor salivary glands, of which there are 3 pairs of major salivary glands, which are the sublingual glands, the parotid glands, and the submandibular glands. There are many minor salivary glands, distributed on the oral mucosa.
The salivary glands work continuously, in addition to keeping the oral environment moist, saliva also has the function of disinfecting, cleaning the mouth, and helping digestion.
In general, healthy adults secrete about 1-1.5 liters of saliva per day, an average of about 30 ml per hour.
Saliva secretion increases when we eat or when the nerves in the brain are stimulated.
Mouth breathing, stress, fatigue, and unbalanced sleeping positions can all cause drooling while sleeping.
In general, drooling while sleeping is common in children because their lips are still weak, and their oral cavity does not have the function of controlling drooling and swallowing saliva.
If adults suddenly and frequently drool while sleeping, they need to be alert to the following diseases:
1. Oral diseases
Pharyngitis, maxillofacial inflammation, gingivitis can stimulate the secretion of salivary glands, leading to drooling.
In addition, crooked, loose teeth, and discomfort when wearing dentures can also cause drooling while sleeping. After straightening your teeth, your drooling will improve.
2. Facial paralysis
Facial paralysis is a condition of paralysis of the muscles on one side of the face. Due to the asymmetrical strength of the muscles on both sides, it is difficult to hold saliva on the paralyzed side and it is easy to drool whether you are sleeping or not.
If accompanied by symptoms such as crooked corners of the mouth, you need to see a doctor immediately.
3. Gastroesophageal reflux disease
Abnormal gastric acid can increase the salivation reflex, and some patients with gastroesophageal reflux may have drooling symptoms, accompanied by common symptoms of gastroesophageal reflux disease including acid reflux, heartburn, and chest pain.
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