The patient’s tongue is not straight when speaking for a number of reasons: 1. The central nervous system is affected by alcohol after the patient has consumed alcohol, which can lead to the patient’s problem of speaking stupidly and not straightening his tongue. 2. If the patient’s tongue is not straight when speaking suddenly, it is considered to be caused by acute cerebrovascular disease, such as cerebral vascular spasm, cerebral blood supply or cerebral infarction, cerebral hemorrhage and other diseases. If the patient’s tongue is not straight when speaking, it may also be caused by a short tongue tie. 4. If the patient’s tongue is not straight when speaking, accompanied by hoarseness, swallowing difficulties or chewing weakness, also consider the performance of motor neuron disease, which belongs to the progressive medullary paralysis type of motor neuron disease.