There is always endless saliva in the mouth may have some relationship with physiological factors, esophageal reflux, chronic pharyngitis and other factors, as follows. 1. Physiological factors: it may be caused by the exuberant secretion of salivary glands, or it may be caused by eating acidic food, which stimulates the salivary glands and increases the secretion of saliva. Generally, no special treatment is needed and it can be relieved by itself. 2. Esophageal reflux: the contents of the stomach reflux into the esophagus, up to the mouth, stimulating the oral mucosa, resulting in increased salivary secretion. It is recommended to take oral acid-suppressing drugs, such as pantoprazole, etc., eat a light diet, and eat less spicy and stimulating food. 3. Chronic pharyngitis: edema and pain in the throat may occur, which in turn stimulates the salivary glands, leading to increased salivary secretion. It is recommended to nebulize the treatment, or oral clearing the throat particles, Pudilan oral solution, and so on. If the symptoms continue to be unrelieved, it is recommended to consult a doctor in time to identify the cause of the disease and carry out targeted treatment, and the drugs should be used in accordance with medical advice.