Always choke on saliva, generally not a sign of cancer, often easy to choke on saliva causes, including the following three: a. Central nervous system disease, common in the brainstem infarction bleeding tumor, can also be seen in bilateral multiple cerebral infarction caused by symptoms of pseudobulbar palsy. Generally easy to choke, but generally food does not occur choking cough, can do head MRI to confirm the diagnosis. Second, due to chronic inflammation of the pharynx, it can lead to relatively more saliva in the oropharynx, and more pharyngeal secretions are sometimes choked unintentionally. Third, there is chronic reflux esophagitis or gastritis and other reasons, stomach acid and other digestive enzymes through the esophagus reflux into the pharynx, which can lead to the patient choking to saliva. Patients need to go to neurology, ENT, and gastroenterology to further confirm the diagnosis once this condition occurs.