Pain in one half of the body may be caused by a variety of reasons, such as acute cerebrovascular disease, myogenic disease, cervical spondylosis, peripheral neuropathy and so on. Specific causes are recommended to be determined after a targeted examination in the hospital. Common causes are detailed below. 1. If half of the body pain is sudden and acute onset, you need to consider the possibility of acute cerebrovascular disease, usually patients can appear half of the limbs pain, numbness and other symptoms, can be clearly diagnosed through the cranial CT or cranial MRI. 2. Cervical spondylosis can also present with hemiplegia, which is usually caused by chronic cervical spondylosis, or recently the patient keeps a posture for a long time leading to muscle spasm in the back of the neck, which can also present with hemiplegia. Patients with insidious onset of the disease at the beginning, the symptoms will gradually worsen, through the cervical spine CT or cervical spine MRI can be clearly diagnosed. 3. Diseases such as diabetes mellitus can cause peripheral neuropathy, which can present with sensory disorder, motor disorder and autonomic nervous system disorder, thus leading to hemiplegia. 4. Half-body pain can also be seen clinically in myogenic diseases such as myositis, which can be clearly diagnosed by enzymatic tests such as creatine kinase or CK-MB. Half of the body pain may also have many reasons, it is recommended that the relevant patients timely medical examination to clarify the cause of the disease and targeted treatment and therapy.