Rotator Cuff Injury (Tendinopathy): Symptoms, Causes & PT Treatment
Updated July 20261 minute read
A rotator cuff injury (tendinopathy) is irritation or overload of the tendons that lift and steady your arm — the most common cause of shoulder pain. It typically hurts with overhead reaching and lifting, and often aches at night. It's rarely an emergency and responds very well to physical therapy, especially progressive strengthening. Most people improve within 6–12 weeks without surgery.
What is rotator cuff tendinopathy?
The rotator cuff is a group of four muscles and tendons that move and stabilize the shoulder. "Tendinopathy" means the tendon has become irritated and less tolerant of load — usually from overuse rather than a single injury.
Symptoms
The classic pattern is pain on the outer shoulder and upper arm, worse with overhead reaching, lifting, or a "painful arc" partway up. Night pain — especially lying on that side — is common, along with mild weakness when the shoulder is sore.
What causes it / risk factors
A sudden increase in overhead activity, repetitive lifting, weak shoulder-blade and cuff muscles, and age-related tendon changes all contribute. It's common in painters, swimmers, and anyone ramping up shoulder work quickly.
How it's diagnosed
Diagnosis is clinical, based on your history and specific strength and movement tests. Imaging is reserved for severe, persistent, or atypical cases, since many pain-free shoulders show tendon changes on scans.
Physical therapy treatment
What a PT does. Your therapist confirms the diagnosis, settles the irritation, and progressively loads the tendon and the muscles around the shoulder blade. Exercises & progression (overview). Rotator cuff and scapular strengthening, gradual return to overhead activity, and load management. Progressive exercise is the best-supported treatment. Recovery timeline. Many people improve within 6–12 weeks of consistent work.
Treatment options compared
PT is first-line. Activity modification and short-term pain relief support it. Injections may help selected cases; surgery is rarely needed for tendinopathy without a significant tear.
Red flags
Seek care for shoulder/arm pain with chest pressure or breathlessness (call emergency services), a hot swollen joint with fever, sudden major weakness, or deformity after an injury.
Frequently asked questions
Sources (3)
- MedlinePlus: Rotator cuff problems. — NIH/MedlinePlus
- AAOS OrthoInfo: Shoulder impingement/rotator cuff tendinitis. — AAOS OrthoInfo
- Steuri R, et al. Effectiveness of conservative interventions including exercise, manual therapy and medical management in adults with shoulder impingement: a systematic review and meta-analysis of RCTs. Br J Sports Med. 2017. — PubMed
This article is for education only and isn't medical advice. Always talk to a licensed clinician about your specific situation.