Rotator cuff tears tend to cause anterior and lateral shoulder pain. This often radiates into the upper arm (level of the deltoid insertion) and elbow. It can radiate into the forearm, but rarely into the fingers. Radiation into the fingers can be a sign of cervical nerve root impingement. Night pain can interrupt sleep, which often instigates the patient to seek treatment.
Any surgical or invasive procedure carries risks. Before proceeding, you should seek a second opinion from an appropriately qualified health practitioner.