Old spitting is related to oral inflammation, spleen and stomach deficiency cold, and cerebrovascular accidents. Oral inflammation mainly includes gingivitis, gum abscess, oral ulcer, when there is inflammation in the mouth, the inflammation will stimulate the salivary glands of the mouth, resulting in excessive saliva secretion, because there is a lot of saliva in the mouth, so it will be accompanied by frequent spitting performance. If you eat cold and irritating food, it will affect the function of the spleen and stomach, and may even lead to spleen and stomach deficiency cold. In addition to indigestion and loss of appetite, these people also have increased saliva secretion. In the event of cerebrovascular accidents, such as cerebral infarction, cerebral hemorrhage, meningitis, these diseases will lead to stimulation of the sympathetic nerve and linguopharyngeal nerve in the brain, which will reduce the ability to regulate the secretion of saliva, and the secretion of saliva will be more, and the swallowing function will also be affected, which will not only lead to frequent spitting, but also choking and coughing when drinking water.