In 2006 had left shoulder pain, and numbness and tingling in my little finger and ring finger. When I went to clip my fingernails I could not squeeze the clippers with my thumb and index finger. I had thought it was my shoulder causing these symptoms, but it was an entrapped ulnar nerve and cubital tunnel is another name for that. When the surgeon cleaned up my shoulder he also released the ulnar nerve. I still have to be careful not to lean that elbow upon something hard.. it will feel sore if I do. I have a pillow in my chair to rest my arm upon so my elbow will not be on a hard surface. I still have some numbness in the little finger, but I can use the fingernail clippers again.
Heat, resting your elbow on a soft surface, an elbow pad or brace, and maybe some arthritic cream may help. If you can take a nsaid like aspirin or Ibuprofen that might help also. Injection of a steroid might help too.