Slow speech may be due to physiological reasons, or it may be caused by motor neuron disease, cerebrovascular disease, mental disorder and other diseases. 1. Physiological reasons: If you simply speak slowly without other uncomfortable symptoms, it may be caused by physiological reasons such as personality, and you don’t need to worry too much. 2. Disease causes: (1) motor neuron disease: if the lesion affects the medulla oblongata and other parts of the body, it will lead to paralysis of the pharyngeal muscles and the vocal cords, which will lead to the performance of slow speech, and it can be accompanied by swallowing difficulties, choking on drinking water and other symptoms. (2) Cerebrovascular disease: such as cerebral hemorrhage, cerebral infarction and other diseases, will affect the patient’s speech center, resulting in slow speech, slurred speech, aphasia and other symptoms. (3) Mental disorders: if the patient has schizophrenia and other diseases, he/she may have diffuse thinking and then slow speech; patients with depression may have slow speech due to slow thinking. (4) Other: slow speech may also be caused by muscle pathology, such as myasthenia gravis and other diseases. If the patient appears to speak slowly accompanied by other discomforts, it is recommended to consult a doctor in a timely manner, under the guidance of the doctor, improve the relevant examination, to clarify the cause of the disease, symptomatic treatment.