If this situation is a few months after the injury, numbness and pain in the arm and numbness in the fingers should be caused by the oppression and stimulation of the nerves. I don't think it was caused by surgery. The bad results caused by the operation can only cause pain and numbness in the arm, but only numbness in the fingers. It is suggested to check the cervical spine for lesions caused by the compression and stimulation of brachial plexus.