There are many causes of sleep drooling and it seems that everyone has been guilty of sleep drooling at one time or another. If this has been the case for a long period of time, it may be the result of some physical ailment that requires attention. So, what are the reasons for drooling in sleep? 1, sleep posture is not right Sleeping when drooling, may be caused by improper sleeping posture, such as lying on the table to sleep, sleeping on the side position, etc.. In this case, just need to properly adjust the sleeping position, you can reduce the occurrence of drooling. 2, poor oral hygiene The temperature and humidity in the oral cavity are most suitable for bacterial reproduction, the accumulation of food debris or sugary substances on the teeth and tooth surface, caries and periodontal disease are prone to occur. Inflammation in the mouth promotes salivation. If the mouth is infected by bacteria, the pain is obvious and easy to drool, local medication is needed to promote the healing of ulcers, and the drooling will disappear automatically. Drooling in bed with a salty taste and a yellowish pillowcase is probably due to poor oral hygiene, accumulation of food debris, more tartar over time, causing inflammation of the gums, and even a small amount of bleeding gums. As a result, when you sleep, the saliva has a salty taste and is yellowish. 3, anterior malocclusion Due to genetic factors and acquired bad habits, such as gnawing nails, spitting, biting the pencil and so on, resulting in malocclusion of the anterior teeth, sleep will drool. Especially convex type malocclusion patients, the front teeth forward protruding more obvious, often appear open lips and teeth, sleep lips are difficult to completely cover the front teeth, upper and lower lips often naturally separate, it is easy to drool. These patients are best to correct their teeth as soon as possible. 4, neuromodulation disorders systemic diseases may also cause drooling during sleep. Salivary secretion regulation is completely neurological reflex, the so-called “quench your thirst by looking at plums”, is an example of conditioned reflex salivary secretion in daily life. Therefore, impaired neural regulation can also produce drooling during sleep. Some patients with neurosis or other systemic diseases that may cause vegetative nerve disorders, parasympathetic abnormal excitation may occur during sleep, which will cause the brain to send out the wrong signals, resulting in an increase in salivary secretion. 5, over-excitement After physical fatigue, overuse of the brain or taking certain drugs may induce nerve disorders, the brain will send out the wrong signals during sleep, causing increased salivary secretion, thus causing drooling. This situation should start from the regulation of life, dietary habits, avoid overeating or hunger, pay attention to rest. Normally, you can eat more barley, lotus seeds, yam, lentils, carrots, mushrooms, dates and so on.