Most tears in patients under the age of 50-55 are traumatic in nature and require an early assessment by an Orthopaedic Surgeon.
Otherwise, it is extremely important to try a period of physiotherapy, pain-killers (including anti-inflammatory medications), modifying your activities and on occasion, steroid injections, to see if the pain from the torn tendon can be settled. Although a torn tendon does not heal itself, the pain from it can certainly be managed.
Any surgical or invasive procedure carries risks. Before proceeding, you should seek a second opinion from an appropriately qualified health practitioner.