There are many causes of saliva like water, including oral diseases, gastrointestinal diseases, etc. The treatment includes medication and surgery. 1. Oral diseases: such as stomatitis, pharyngitis and other diseases, mainly due to inflammatory stimulation caused by excessive secretion of salivary glands and watery. (1) stomatitis: such as herpes stomatitis commonly used drugs include acyclovir, ganciclovir, etc.; Candida mouth can be used to gargle with sodium bicarbonate solution; allergic stomatitis can be used to loratadine, cyproheptadine, etc.; ulcerative stomatitis pain can be used to relieve pain with lidocaine gel. (2) pharyngitis: anti-inflammatory and analgesic drugs such as acetaminophen can be used, but also the application of throat spray chlorhexidine gluconate. (2) Gastrointestinal diseases: such as gastritis, reflux esophagitis and other diseases will appear in the stomach acid secretion over, spit acid water, patients feel like saliva. (1) Gastritis: Commonly used drugs include domperidone, mitomycin pancreatic enzyme tablets, omeprazole, amoxicillin, colloidal bismuth subcitrate and so on. (2) Reflux esophagitis: commonly used acid suppressants include omeprazole, ranitidine, etc. If necessary, laparoscopic fundoplication or anti-reflux surgery, endoscopic surgical treatment, etc. can still be taken. In addition to the above diseases, due to esophageal stenosis and other reasons can also cause relative excessive secretion of saliva like watery fluid. It is recommended to go to the hospital to find out the cause of the disease and have regular treatment under the doctor’s guidance. All the above medications should be used under doctor’s guidance, avoid self-medication.