Most people will drool when they see delicious food. This is because the brain's memory of the delicious food triggers saliva secretion, resulting in drooling. This is the so-called "looking at plum blossoms to quench thirst", which is a normal phenomenon.

For some people, due to physical reasons, certain tissues and organs of the body cannot withstand excessive mental pressure. The salivary glands overreact to the stimulation of mental factors, and the brain forms an abnormal conditioned reflex. Like habits, both external environment and mental stimulation will cause

Causes excessive drooling. When you see someone or something you particularly like, you will drool involuntarily. When you are mentally stressed, you will drool or drool or keep swallowing. When you are nervous, you will drool or drool or swallow non-stop.

Swallowing saliva. When you are bored, you will drool or keep swallowing saliva. In a few minutes or even seconds, your mouth will be full of saliva, and you have to spit it out or swallow it. It is quite uncomfortable. At this time, the saliva

It is no longer "golden gold and jade liquid", but has become an obstacle that affects people's normal social interactions, life and learning.

The direct cause of excessive salivation, drooling, or constant swallowing of saliva is that the autonomic nerve activity that controls the salivary glands is relatively excited. Due to the discomfort and stimulation of excessive salivation, subjective excessive attention is paid to one's own saliva. Over time, some people will suffer from mild obsessive-compulsive disorder.

, will involuntarily pay attention to their own and other people's saliva secretion, swallowing for a long time will cause discomfort to the facial muscles, mouth or jaw joints, etc., they will drool a lot when speaking in crowded situations, and children will spit constantly.

Adults will keep swallowing or swallowing saliva to cover up their excessive salivation. At the same time, they will also pay attention to the salivation of others when they are talking. When they are bored, their thoughts will turn to their saliva and they will feel excessive salivation. They are in a state of "discomfort caused by excessive salivation".

Stimulation - excessive attention - and then causing excessive drooling in a vicious cycle that cannot be extricated