Shoulder Keeps Popping Out (Instability): Symptoms, Causes & PT Treatment
Updated July 20261 minute read
Shoulder instability means the ball of the joint slips partly (subluxation) or fully (dislocation) out of its socket, or feels like it might. It often follows a dislocation or develops in people with naturally loose joints. Physical therapy that strengthens the rotator cuff and shoulder-blade muscles is the cornerstone of treatment; surgery is considered for recurrent dislocations or structural damage. A shoulder that's dislocated and won't go back needs emergency care.
What is shoulder instability?
Instability describes a shoulder that doesn't stay centered in its socket. It ranges from a feeling of looseness to repeated subluxations or full dislocations.
Symptoms
Common features are a sense that the shoulder might "give way" or slip, apprehension with the arm in certain positions (like cocking to throw), clicking, and episodes of the shoulder partly or fully popping out.
What causes it / risk factors
A prior dislocation (often with labral damage), naturally lax joints, and repetitive overhead stress all contribute. Younger people who dislocate are more likely to have recurrences.
How it's diagnosed
A clinician assesses stability and apprehension; imaging evaluates labral or bone damage when surgery is considered.
Physical therapy treatment
What a PT does. Your therapist builds dynamic stability — strengthening the rotator cuff and shoulder-blade muscles and retraining control so the shoulder stays centered. Exercises & progression (overview). Cuff and scapular strengthening, proprioception and control work, and graded return to sport. PT is first-line for many cases of instability. Recovery timeline. Strengthening programs typically run several months; results depend on the cause.
Treatment options compared
PT is central. Surgery is considered for recurrent dislocations, significant structural damage, or athletes in high-demand sports — always followed by rehab.
Red flags
A shoulder that is dislocated and won't reduce is an emergency. Seek prompt care for numbness, a cold or pale arm, or deformity after trauma.
Frequently asked questions
Sources (3)
- AAOS OrthoInfo: Chronic Shoulder Instability and Dislocation. — AAOS OrthoInfo
- AAOS OrthoInfo: Shoulder Dislocation. — AAOS OrthoInfo
- Warby SA, et al. Exercise-based management versus surgery for multidirectional instability of the glenohumeral joint: a systematic review. Br J Sports Med. 2016. — British Journal of Sports Medicine
This article is for education only and isn't medical advice. Always talk to a licensed clinician about your specific situation.