What is hand weakness (unilateral)?
A person with unilateral hand weakness has muscle weakness in one hand. Weakness can be caused by malfunction of part of the brain, spinal cord, or spinal nerves. All of these structures play a role in stimulating the muscles to move the hand or fingers.

What are the symptoms of hand weakness (unilateral)?
Symptoms depend on the underlying cause for the hand weakness (unilateral). Symptoms that may be present include hand numbness, arm weakness, hand swelling, and clumsiness of the hands.

How does the doctor treat hand weakness (unilateral)?
Treatment depends on the underlying cause for the hand weakness (unilateral). Options may include medications, vitamins, and surgery.