Heated Nimble Mitts Helps with Arthritis Rheumatoid Psoriatric Rheumatism NEW. The NimbleMitt was created by Dr. Alton Morris, noted Rheumatologist and founding member of the American College of Rheumatology. It was designed to provide therapeutic relief for arthritis of the hands. NimbleMitt will help preserve the functions of your hands, relieve pain, and increase mobility. Proven effective at treating symptoms caused by Reynaud's Syndrome and Fibromyalgia. The NimbleMitt is safe, affordable and effective.