Although monoplegia is a condition of limb impotence and flaccidity, it is often associated with lung, spleen (stomach), liver and kidney pathologies. TCM diagnosis: monoplegia refers to the inability to move the limbs at will while the mind is generally clear, and can be seen in the lower limbs, or upper limbs, or all four limbs, or half of the limbs, etc. Therefore, syncope type diseases, epilepsy, etc., in a state of delirium and coma with movement disorders, shall not be recognized as monoplegia. TCM practitioners can generally clarify whether the symptoms are due to cerebral neuropathy, exogenous warm-heat disease, or traumatic somatic lesions by asking patients about their medical history, symptoms, and relevant examinations. For further localization and qualitative diagnosis, we need to do the following: 1, laboratory and physical examination: CT and MR of the head and spinal cord are required for patients with monoplegia, especially MR examination of brainstem and spinal cord lesions is better than other methods of examination, and evoked potential examination is preferred for the examination of my multiple sclerosis disease. 2, neurological examination: according to the medical history and symptoms, cerebrospinal fluid examination, spinal and cranial X-ray and imaging, EEG, EMG, pathological examination, blood biochemical examination can be done selectively, which can help to clarify the diagnosis and differentiate the disease species.