Complete loss of swallowing function after surgery may be due to anesthesia has not been eliminated, local injury of the throat, brain damage and other reasons. 1. The anesthesia has not been eliminated: the anesthesia has not been completely metabolized in a short period of time after the surgery, especially the longer general anesthesia surgery, and the throat muscles are in a state of relaxation, so the above symptoms will appear. When the anesthesia drug effect disappears, swallowing function will gradually recover. 2. Local injury of throat: thyroid surgery, laryngeal tumor resection, tracheotomy and other surgeries may damage the superior laryngeal nerve, recurrent laryngeal nerve, pharyngeal muscles and other nerves and muscles that innervate laryngeal movement and sensation, which will lead to swallowing difficulty, hoarseness, choking on drinking water and other symptoms. 3. Brain injury: craniotomy operation for brain hemorrhage, brain tumor and other diseases may lead to local brain neuron damage, nerve dysfunction of the muscles of the throat, so swallowing function is completely lost. The complete loss of swallowing function after surgery may be related to a variety of factors, it is recommended to consult a doctor for a clear diagnosis.