See list below. Risks of shoulder surgery include but are not limited to: incomplete relief of pain, incomplete return of function, infections, stiffness, crps, nerve injury: axillary nerve, brachial plexus, fluid extravasation, chondrolysis, hematoma, chondral injury / arthritis, dvt/pe.
Fairly Safe. General and regional anesthesia reactions, which are rare. Infections are extremely rare. Nerve injuries about the shoulder are rare. Persistent pain, stiffness and weakness are the most common. Therapy is a must after surgery to reduce these more common risks.
Infection. An infection is the greatest risk but it is less than one percent. Nerve injury and stiffness are also risks.
Same 4 other surgery. Any surgery has a risks of pain, infection, damage to neurovascular structures or worst of all, failure. In general arthroscopic surgeries have a lower rate of infection than similar open procedures. Arthroscopic surgery provides better visualization with less soft tissue damage. Typically the recovery is faster and there is less pain than with open procedures.
Talk to your surgeon. Talk to your orthopaedic surgeon who will give you both the non-operative treatment options and operative treatment options and the risks and benefits of each. If you are uncertain about a surgery, get a second opinion.
If failed therapy. For most shoulder injuries or conditions, surgery is an option, but only after an adequate amount of time has been allowed for the condition to resolve, and conservative treatment with physical therapy, anti-inflammatory medication and activity modification have been tried. However, surgery might be the best option for painful rotator cuff or cartilage tears, instability, or impingement.
Depend. That depends on the surgery. That should be discussed with your surgeon who can probably refer you for physical therapy specific to the type of surgery done.