Frequent spitting may be caused by oral diseases, gastrointestinal diseases, improper diet and other reasons. When people do not improve the symptoms of spitting for a long time, it is recommended to be examined under the guidance of a doctor to clarify the cause of the disease and treat the cause. 1. Oral diseases: when suffering from periodontitis and pulpitis, people are prone to spit a lot. In addition, during the period of wearing braces for orthodontic treatment, the uncomfortable symptom of excessive drooling and frequent spitting will also occur. 2. Gastrointestinal diseases: when suffering from gastrointestinal diseases (such as gastric ulcer, reflux esophagitis, etc.), the mucous membrane of the digestive tract will also be stimulated, so that the secretion of tissue fluids is in hyperactive, and there will be a lot of drooling and frequent spitting. 3. Improper diet: when people eat too much sweet or acidic food, the salivary glands will be stimulated to secrete too much saliva, and the frequency of spitting will become more frequent. It is recommended that people pay attention to a reasonable diet in their daily lives, keep their mouths clean, and under the guidance of a doctor for treatment if necessary.