I Have Occasional Numbness In My Left Arm From The Shoulder Down To My Wrist. Sometimes It Is Followed By A Hot Burning Sensation Lasting About 20 Seconds, Then Goes Away When I Lower My Arm Or Shake It. Do You Have Any Suggestions?

Numbness is abnormal sensation that occur any where in the body. It can be due to nerve damage in the neck or back, herniated disc, lack of blood supply in the affected area, remaining at same sitting or standing position, carpal tunnel syndrome, abnormal levels of sodium, potassium and calcium in body, Vitamin B12 deficiency etc.
Treatment of numbness depends upon underlying cause. So, it will be good to see a doctor for proper diagnosis and treatment.