I am having numbness in my left arm and hand.

Hello. Thank you for posting.

Is this sudden? An ongoing problem? Hand numbness is usually caused by damage, irritation or compression of one of the nerves or a branch of one of the nerves in your arm and wrist. Diseases affecting the peripheral nerves, such as diabetes, also can cause numbness, although with diabetes similar symptoms usually occur first in your feet.

Your doctor can tell you more after an evaluation.

Helena