Total spitting can lead to the loss of saliva in the mouth, resulting in dry mouth, oral infectious diseases or digestive disorders and other hazards that need to be specifically analyzed. 1. Dry mouth: saliva has a cleaning and moisturizing effect on the oral cavity, if often spit, it can lead to the loss of saliva in the mouth, resulting in dry mouth and thirst symptoms. 2. Oral infectious diseases: saliva contains a certain amount of lysozyme and other substances, to maintain the balance of bacterial flora in the oral cavity has a very important role. Therefore, if the saliva is not enough, it is very likely to lead to the imbalance of the flora, which will lead to oral infectious diseases. 3. Digestive disorders: saliva also contains a certain number and type of digestive enzymes, such as salivary amylase, if the salivary amylase is not enough, may affect the starch class of substances in the body of the digestion and absorption, resulting in digestive disorders. The patient is best to correct their habit of always spitting, if because of disease factors lead to want to spit, you need to improve the relevant examination in time, and under the guidance of the doctor to carry out targeted treatment and therapy.