Shoulder Instability: What's Going On and What Helps
Your shoulder slips, or it feels like it might. Maybe it started with a fall or a hard tackle, or maybe with no clear injury at all. Either way, you begin guarding it and avoiding overhead positions. Shoulder instability is the term for a shoulder that does not stay centered in its socket the way it should.
What is shoulder instability?
The shoulder has the greatest range of motion of any joint in the body. That freedom is useful, and it also makes the joint easier to destabilize [2]. Instability happens when the ball of the upper arm bone is forced out of the shallow socket. A partial slip is called a subluxation, and a complete dislocation means the ball comes all the way out [2].
It often starts with a sudden injury such as a fall or accident. After a first dislocation the shoulder is more vulnerable to another one, and the risk depends on age and how well the joint healed [1][2]. Some people have instability without ever dislocating. Many have naturally looser ligaments, and repetitive overhead motion in swimming, tennis, volleyball, or overhead work can add to it [2].
What does it feel like?
Common symptoms of ongoing instability include repeated dislocations, repeated episodes of the shoulder giving out, a persistent feeling that the shoulder is loose, slipping in and out of the joint or "just hanging there," and pain [2]. Your exam helps sort out what is going on.
Red flags that need urgent care
A suspected dislocation should be seen right away. The NHS says to go to the emergency room if you have injured your shoulder and [1]:
You cannot move your arm
Your shoulder looks out of place or has changed shape
Your shoulder is painful, bruised, or swollen
While you wait, hold an ice pack on the shoulder for up to 20 minutes every 2 to 3 hours, support the arm in a sling or towel, and take paracetamol if needed. Do not move your upper arm, and do not try to put the arm back in yourself [1]. Do not drive yourself. In general, numbness, tingling, or a cold or pale hand after a shoulder injury also calls for urgent care.
What can you do at home?
For a shoulder that is settled but unreliable, the first steps are usually activity changes, avoiding the positions that aggravate it, and an anti-inflammatory if it is safe for you [2]. It often takes several months of nonsurgical care to tell how well it is working [2].
After a dislocation is put back in place, recovery usually takes 6 to 12 weeks, and up to about 16 weeks to return to some sports, with a sling for the first few weeks [1]. Follow the instructions your physician or physical therapist gives you.
How does physical therapy help?
The research here is mixed, so I will lay it out plainly.
For a first-time dislocation, a large UK trial (the ARTISAN trial) compared a single session of advice, written materials, and an option to self-refer to physiotherapy against the same advice plus an additional physiotherapy program. It included 482 adults. There was no significant difference between the two groups in shoulder function at 6 months [3]. In that setting, extra supervised physiotherapy did not clearly add to good advice.
A smaller trial of 56 people with traumatic dislocations, some first-time and some recurrent, compared 12 weeks of supervised neuromuscular exercise (SINEX) with home-based standard shoulder exercises. The supervised group did better on the main outcome score. The average difference of 228 points was just under the trial's own threshold for a clearly meaningful difference (250 points), and fewer people in the supervised group underwent or were referred for stabilizing surgery, but that difference was not statistically significant [4].
A 2023 review of studies after a first traumatic dislocation found that people treated with exercise alone were about twice as likely to have another episode of instability as people who had surgery plus exercise [5]. Surgery is a reasonable conversation if your shoulder keeps dislocating, and OrthoInfo notes it is offered to people with repeated dislocations [2].
My read, which is an interpretation and not a rule: strengthening the muscles around the shoulder and retraining control, as OrthoInfo describes [2], is a sensible first step for many people, matched to your age, how often it has dislocated, and what you do.
When should you get seen?
Get urgent care for a suspected dislocation [1]. For a shoulder that keeps giving out, feels loose, or hurts with everyday reaching, book an evaluation rather than waiting for the next episode. If the shoulder has dislocated more than once, a doctor visit about imaging and surgical options is worth having alongside rehabilitation [2].
How can Hybrid Physical Therapy help?
We spend the first visit working out what is driving your shoulder symptoms, not just where it hurts. You work one-on-one with a Doctor of Physical Therapy every session, and we build the plan around what you want to get back to, whether that is reaching overhead or getting back in the pool.
This post is general education and does not replace an exam. If your shoulder has been giving out or feeling loose, come in and let us take a look.
Let Hybrid Physical Therapy be the ones to optimize your performance.
References:
NHS. Dislocated shoulder. Page last reviewed 16 September 2026. Source page
OrthoInfo (AAOS). Chronic Shoulder Instability and Dislocation. Source page
Kearney RS, Ellard DR, Parsons H, et al. Acute rehabilitation following traumatic anterior shoulder dislocation (ARTISAN): pragmatic, multicentre, randomised controlled trial. BMJ. 2024;384:e076925. doi:10.1136/bmj-2023-076925. PubMed (PMID 38233068)
Eshoj HR, Rasmussen S, Frich LH, et al. Neuromuscular Exercises Improve Shoulder Function More Than Standard Care Exercises in Patients With a Traumatic Anterior Shoulder Dislocation: A Randomized Controlled Trial. Orthop J Sports Med. 2020;8(1):2325967119896102. doi:10.1177/2325967119896102. PubMed (PMID 32064291)
Chiddarwar V, de Zoete RMJ, Dickson C, et al. Effectiveness of combined surgical and exercise-based interventions following primary traumatic anterior shoulder dislocation: a systematic review and meta-analysis. Br J Sports Med. 2023;57(23):1498-1508. doi:10.1136/bjsports-2022-106422. PubMed (PMID 37451706)
Comments