What causes numbness in the arm?

Generally, arm numbness may be caused by poor posture, localized pressure, peripheral neuropathy, multiple sclerosis, cervical spondylosis, and other factors. Symptomatic management through general treatments, medication, and other methods is recommended. If discomfort persists, timely medical consultation is advised for appropriate treatment under a physician's guidance. Detailed analysis is as follows:

1. Poor Posture

Maintaining poor posture for extended periods, such as hunching over a computer, sleeping with the arm compressed on a desk, or lying on one side with the arm trapped under the body, can compress nerves and blood vessels, leading to impaired circulation and arm numbness. It is recommended to improve blood circulation and alleviate numbness through methods such as warm compresses and massage.

2. Localized Pressure

Prolonged external pressure on the arm, such as leaning on the elbow for extended periods or having the arm compressed by heavy objects, can also cause numbness. Usually, no additional symptoms are present, and the numbness typically subsides gradually once the pressure is relieved. It is recommended to avoid prolonged pressure on the arm to maintain proper blood circulation.

3. Peripheral Neuropathy

Peripheral neuropathy may be caused by infections, toxins, and other factors. Inflammation affects the nerves, impairing nerve conduction and causing limb numbness, possibly accompanied by pain and muscle weakness. It is recommended to follow medical advice to treat with medications such as carbamazepine tablets, oxcarbazepine tablets, or gabapentin capsules.

4. Multiple Sclerosis

Multiple sclerosis is primarily caused by a combination of autoimmune responses, viral infections, genetic factors, and others. The immune system attacks the myelin sheath, impairing nerve conduction, which leads to limb numbness and may be accompanied by visual disturbances and muscle weakness. It is recommended to follow medical advice and use medications such as glatiramer acetate injection, dimethyl fumarate enteric-coated capsules, or teriflunomide tablets to alleviate symptoms.

5. Cervical Spondylosis

Chronic strain and degeneration of the cervical spine may lead to cervical spondylosis, where nerve roots become compressed, impairing nerve conduction and causing arm numbness, possibly accompanied by neck pain and shoulder or back aches. It is recommended to follow medical guidance and use medications such as ibuprofen tablets, aceclofenac tablets, or Jingfukang granules for treatment.

It is also recommended to avoid maintaining the same posture for prolonged periods in daily life, such as sitting or standing for long durations. Regularly getting up to move around, stretching the arms, and rotating the shoulders can help promote blood circulation.