For half body pain, it can be seen in brain diseases, myogenic diseases, etc., as follows: 1. Brain diseases: especially thalamic lesions, because the thalamus is the relay station of sensation, after the occurrence of lesions, the patient can have pain and numbness in the contralateral side of the body, and in severe cases, the ankylosing sensation can appear. In the case of hemiplegia, it is recommended that the patient undergoes a head MRI, which can reveal the occupancy, hemorrhage and infarction of the thalamic lesion. 2. myogenic diseases: hemiplegia can be seen clinically in myogenic diseases, such as myositis, where the patient has hemiplegia and can also be accompanied by swelling of the muscles of the deviated body. enzymatic tests, such as creatine kinase or CK-MB, can be performed, and if necessary, hormone therapy is required. 3. 3, lactic acid accumulation: half of the body pain can also be seen clinically in patients due to long periods of inactivity, sudden strenuous exercise, muscle pain can occur, considered to be caused by lactic acid accumulation, the problem is not significant.