There are many reasons for arm weakness, the common ones are overwork, cervical disc herniation, cerebral infarction and so on.
1. Overexertion: After strenuous exercise or workout, arm weakness may occur, which can be relieved by oneself.
2. Cervical disc herniation: degenerative changes of cervical intervertebral discs, the nucleus pulposus protrudes or prolapses in the posterior spinal canal, causing the spinal cord and spinal nerve roots to be compressed, which can cause neck pain, and radiating pain, numbness, and weakness of the upper limbs.
3. Cerebral infarction: It is a kind of blood circulation disorder in the brain, resulting in ischemic necrosis or softening of brain tissue caused by ischemia and hypoxia. The symptoms may include hemiplegia, sensory impairment, aphasia, etc., or arm weakness, which may vary according to the location and size of the infarction.
There may be other causes of arm weakness, such as brachial plexus nerve injury and hemiplegia, etc. It is recommended to go to the hospital in time to clarify the cause of the disease and give targeted treatment.