What happens when left arm goes limp?

Left arm going limp can be a symptom of various medical conditions and requires immediate medical attention. Here are a few possible causes:

1. Stroke: A stroke occurs when the blood supply to the brain is interrupted, depriving brain cells of oxygen. If the stroke affects the right side of the brain, it can lead to the left arm going limp and weakness on the left side of the body.

2. Transient Ischemic Attack (TIA): A TIA, also known as a mini-stroke, is a temporary interruption of blood flow to the brain that resolves within 24 hours. Symptoms of a TIA are similar to stroke, including temporary weakness or numbness on one side of the body, including the left arm.

3. Cervical Spine Injury: Injuries to the cervical spine, such as severe neck trauma or whiplash, can damage the nerves that control movement and sensation in the arms. This can result in weakness or paralysis of the left arm.

4. Peripheral Nerve Damage: Damage to the peripheral nerves that supply the left arm, such as the brachial plexus or ulnar nerve, can lead to weakness, muscle atrophy, and loss of sensation in the affected arm.

5. Multiple Sclerosis (MS): MS is an autoimmune disease that affects the central nervous system, including the brain and spinal cord. Symptoms of MS can vary depending on the location and severity of the lesions, and they may include left arm weakness or paralysis.

If you experience sudden onset of left arm weakness or limpness, it is crucial to seek emergency medical attention. These symptoms could indicate a serious medical condition, and rapid diagnosis and treatment can significantly improve the chances of recovery. Call 911 or go to the nearest emergency department immediately.