I had R. Medial epicondylar release unlar nerve decompression 6weeks ago. My arm on the outside is numb so are my fingers is that normal?

Ask your surgeon. The purpose of the surgery is to not have the numbness. Surgery causes swelling and inflammation of the surgical area, due to the nature of the healing process, and that swelling can cause the 'compression' symptoms that should resolve as the swelling goes down. Ask your doctor about the time expected to see improvement in symptoms.