Uneven Shoulders: What Causes Them and How Do You Find Out Why?
Uneven shoulders happen when one shoulder sits noticeably higher or more forward than the other. The cause is rarely in the shoulder itself. It usually starts lower down, in the spine, pelvis or hips, and the shoulder simply adapts to keep your head level. A standing whole-body image can reveal where the real imbalance begins.
Key takeaways
- One shoulder higher than the other is common and usually painless at first, but it can signal an alignment issue elsewhere in your body.
- Causes range from spinal curves (including scoliosis) to a tilted pelvis or a leg-length difference.
- Lying-down scans can miss alignment problems because gravity is removed. Standing imaging shows your body as it actually functions.
- An EOS standing scan captures your full skeleton from head to feet in one low-dose image, using about 90% less radiation than a standard X-ray.
- ScanAlign provides diagnostic imaging only. Any treatment plan comes from your clinician.
How can you tell if your shoulders are uneven?
You might notice it in a mirror, in photographs, or when clothes hang differently on each side. Sometimes someone else points it out before you spot it yourself. Here are the most common signs.
The most obvious sign. You may see it when looking at yourself straight on in a mirror.
One blade may stick out further or sit higher than the other, visible from behind.
Bag straps slip off one side, necklines shift, or a hemline hangs at an angle.
Muscles on one side work harder to compensate, which can lead to tension or stiffness over time.
Why is one shoulder higher than the other?
The most common reason is that something below the shoulders is out of alignment. Your body is very good at adapting. If the spine curves to one side, or the pelvis tilts, the shoulders adjust to keep your eyes and head level. That compensation is what creates the visible unevenness.
Here are some of the most common underlying causes.
A sideways curve of the spine is one of the best-known reasons for one shoulder sitting higher than the other.
If one side of the pelvis is higher, the spine shifts sideways and the shoulders follow.
Even a small difference can tip the pelvis, creating a chain reaction all the way up to the shoulders.
Years of carrying a bag on one side, sitting in a twisted posture, or favouring one hand can create lasting imbalance.
Can uneven shoulders be caused by something in your hips or legs?
Yes. Your body works as a connected chain from your feet to your head. If one link moves out of position, everything above and below adjusts. A tilted pelvis makes the spine curve. A curved spine makes the shoulders uneven. Uneven shoulders make the neck muscles work harder. This is called compensation, and it is why pain often shows up far from its true source.
This is also why looking at just one area, such as the shoulder joint alone, can miss the real problem. A scan of the shoulder might look perfectly normal, even when the underlying alignment issue is in the lower spine or pelvis.
Want to see how your whole alignment connects? ScanAlign captures your full skeleton in one standing image.
Learn about whole-body EOS imagingHow is shoulder alignment assessed when you are standing up?
It is assessed using an EOS standing scan, which captures your full skeleton while you stand in your natural posture. This matters because lying-down imaging, such as a standard X-ray, CT or MRI, removes the effect of gravity. Your muscles relax, your curves flatten out, and the alignment shift that causes your uneven shoulders may not show at all.
A standing EOS image shows every link in the chain at once. Your radiographer and clinician can trace the line from your feet through your knees, hips, pelvis and spine to your shoulders. They can see exactly where the compensation starts and how it travels upward.
The EOS system uses about 90% less radiation than a standard X-ray, around ten times less. It takes only a few seconds to capture the full image, and there is no enclosed tunnel.
When is MRI better? EOS shows bones, joints and alignment clearly. If your clinician suspects a soft-tissue problem, such as a rotator cuff tear, a disc issue, or nerve compression, MRI is usually the better tool. The two types of imaging often work well together.
What can help with uneven shoulders?
The right approach depends entirely on what is causing the unevenness. That is why accurate diagnosis comes first. Here are some of the directions a clinician may consider once the cause is clear.
- Targeted physiotherapy. Strengthening weaker muscles and stretching tighter ones can gradually improve balance, especially when the issue is largely muscular.
- Addressing a pelvic tilt or leg-length difference. If the root cause is lower down, a clinician might look at orthotics, manual therapy, or other approaches to level the foundation.
- Posture awareness. Simple changes to workstation setup, bag-carrying habits, or sleeping position may reduce further strain.
- Specialist referral. Where a spinal curve or structural issue is involved, your clinician may refer you to an orthopaedic or spinal specialist for further assessment.
ScanAlign does not provide treatment. It provides the detailed standing alignment imaging that helps your clinician choose the right course of action. You can learn more about how spinal alignment is assessed.
Important. If you experience sudden weakness in your arms or hands, numbness spreading into both arms, or loss of bladder or bowel control alongside your shoulder or back symptoms, seek urgent medical attention. Contact your GP, call 111, or go to A&E.
Frequently asked questions about uneven shoulders
The most common reason is that something below the shoulders, such as a spinal curve, a tilted pelvis, or a leg-length difference, has shifted your alignment. The shoulder adjusts to keep your head level.
Yes. One shoulder sitting higher than the other is one of the visible signs of scoliosis, a sideways curve of the spine. A standing image of the full spine can confirm whether a curve is present and how it affects overall alignment.
It depends on the cause. If the unevenness is mainly muscular, targeted stretching and strengthening may help. If there is a structural issue in the spine or pelvis, exercises alone may not fully address it. Getting the right imaging first helps guide the right approach.
No. ScanAlign is a self-pay clinic, so you can book directly without a referral. You start with a free video consultation to make sure the scan is right for you.
An EOS scan uses about 90% less radiation than a standard X-ray, around ten times less. You can read more about safety on our FAQs page.
An EOS scan captures your entire skeleton from head to feet in one image while you stand. A normal X-ray typically focuses on one small area and is often taken lying down, which relaxes your muscles and can hide alignment problems that only appear when weight-bearing.
Yes. A tilted pelvis shifts the base of the spine sideways. The spine compensates by curving, and the shoulders adjust in response. This chain reaction is one of the most common reasons for uneven shoulders.
Pricing details are listed on our FAQs and cost page. You can also discuss options during your free video consultation.
Either approach can work. Some people start with physiotherapy and get imaging if progress stalls. Others prefer to understand the full picture first so treatment can be targeted from the start. A free video consultation with ScanAlign can help you decide which makes sense for your situation.
Yes. Because the EOS scan captures your full skeleton in one standing image, it can assess your hips, knees and overall leg alignment at the same time as your spine and shoulders. You can learn more about hip alignment imaging or knee alignment imaging.
See the full picture of your alignment
A free video consultation helps you find out whether a standing EOS scan is the right next step for your uneven shoulders.
Book a free video consultationWritten by Abbas Dhami (Specialist Diagnostic Radiographer)
Sources
- NHS. "Scoliosis." nhs.uk, 2023. Overview of causes, signs and management of spinal curvature.
- Illés, T. et al. "The EOS imaging system and its uses in daily orthopaedic practice." International Orthopaedics, 36(7), 2012, pp. 1405-1411.
- Dubousset, J. et al. "EOS: A new imaging concept." Revue de Chirurgie Orthopédique et Réparatrice de l'Appareil Moteur, 91(5 Suppl), 2005, pp. 13-25.
This page is general information and not a diagnosis.
ScanAlign is the trading name of CoreMed Solutions Ltd and operates under The Harley Street Hospital's CQC licence.