- Age-related degeneration: The most common cause — tendon tissue slowly frays over decades, which is why tears become increasingly common after age 60, often with surprisingly little pain at first.
- Repetitive overhead activity: Tennis, swimming, baseball, painting, and carpentry repeatedly stress the cuff.
- Acute injury: A fall onto an outstretched arm or lifting something too heavy can tear a tendon suddenly.
- Impingement: Bone spurs on the shoulder blade can rub the tendons with each arm raise, gradually wearing them down.
- Dull, deep shoulder ache: Often worse with overhead reaching or reaching behind the back, such as fastening a seatbelt or a bra.
- Night pain: Difficulty sleeping on the affected shoulder is one of the most consistent features.
- Weakness: Trouble lifting the arm, combing hair, or carrying groceries; sudden marked weakness after an injury suggests an acute tear and deserves prompt evaluation.
- Crackling or catching: Grinding sensations with certain movements.
- Physical therapy: The cornerstone of treatment. Progressive exercises strengthen the intact cuff muscles and the muscles that stabilize the shoulder blade, restoring pain-free motion over weeks to months.
- Relative rest: Avoiding aggravating overhead activity while staying generally active — complete immobilization stiffens the shoulder and slows recovery.
- Anti-inflammatory medication: NSAIDs such as naproxen or meloxicam reduce pain enough to participate fully in therapy.
- Corticosteroid injection: An injection into the bursa can calm severe pain, used selectively because repeated injections may weaken tendon tissue.
- Surgery: Repair is considered for acute full-thickness tears in active people, and for persistent pain and weakness despite several months of good conservative care.