Rotated Pelvis: What Causes It and How Do You Know You Have One?
A rotated pelvis means one side of your pelvis has twisted forward or backward compared with the other side. This changes the way your body carries weight. It often causes pain in your back, hip or knee, rather than in the pelvis itself. Standing, weight-bearing imaging is usually the clearest way to see the rotation and measure it accurately.
Key points
- A rotated pelvis, sometimes called pelvic torsion, is when one side of the pelvis sits further forward or back than the other.
- Symptoms often appear away from the pelvis, because the body makes up for it through the spine, hips and legs.
- Scans done lying down can miss the rotation, because gravity relaxes the muscles that hold the twist in place.
- An EOS standing scan captures your whole alignment from head to feet in a single image, using about 90% less radiation than a standard X-ray.
What is a rotated pelvis?
A rotated pelvis is a change in position where one half of your pelvis turns forward while the other turns backward. Think of your pelvis as a bowl. When it sits level, your weight spreads evenly through both hips, both legs and your spine. When it twists, everything above and below has to adjust.
This is different from a pelvic tilt, where the whole pelvis tips forward or backward. With pelvic torsion, the two sides move in opposite directions. It can be subtle, but even a small rotation changes the way your joints line up under load.
What are the symptoms of a twisted pelvis?
The symptoms of a twisted pelvis vary a lot, because the rotation forces other joints to make up for it. You may never feel pain in the pelvis itself. Instead, pain often shows up in the places taking the extra load.
The spine curves to balance out the rotation. This overloads the muscles and joints on one side of the lower back.
One hip socket is pushed into a slightly different position. This can pinch or stretch the soft tissue around it.
Rotation changes the angle of the thigh bone. This can shift stress onto the knee, or make one leg feel functionally shorter.
You may notice your shoes wear unevenly, or that walking feels slightly lopsided.
Important: If you have sudden numbness, weakness in your legs, or loss of bladder or bowel control, get urgent medical help. Contact your doctor, call your local emergency number, or go to the nearest emergency department. These symptoms need to be checked straight away, not booked in for a scan.
What causes a rotated pelvis?
Pelvic torsion usually develops slowly. It is rarely caused by a single event. Several factors can pull or hold the pelvis into a twisted position over time.
Tight hip flexors or a weak glute on one side can slowly pull the pelvis out of alignment.
Sitting cross-legged, always leaning on one hip, or standing with your weight on one leg for long periods.
Even a small difference in leg length, whether structural or functional, can tilt and twist the pelvis over time.
An old hip, back or leg injury can leave scar tissue or guarding patterns that hold the pelvis in a rotated position.
Why can scans done lying down miss a rotated pelvis?
Imaging done lying down, including standard X-rays, CT and MRI, removes the effect of gravity and relaxes your muscles. When you lie flat, a mild pelvic rotation can correct itself for a while. The twist only shows up reliably when you are standing and your body is carrying its own weight.
Your body works as a connected chain from your feet to your head. A rotation in the pelvis does not stay in one place. It causes the spine to curve, one hip to take load differently, and the knees and ankles to adjust. A scan of just the painful spot, such as a knee MRI, might look normal. It does not capture the cause further up the chain.
Shows the real picture. When you stand, gravity pulls on your skeleton and your muscles engage. A pelvic rotation can be seen because it is actively happening. A full-length standing image shows how the rotation affects your spine, hips, knees and ankles all at once.
Can hide the problem. Lying flat lets your muscles relax and your joints settle into a neutral position. A mild or moderate pelvic rotation can seem to correct itself on the table. The images may then look normal even though your symptoms carry on.
How does an EOS scan assess a rotated pelvis?
An EOS scan captures a full-length, weight-bearing image of your skeleton from head to feet in a single pass while you stand naturally. This gives a clear view of how the pelvis sits in relation to the spine above and the legs below, exactly as it is in everyday life.
The scan uses about 90% less radiation than a standard X-ray, around ten times less. It takes under a minute and needs no injections or contrast dye. You stay fully dressed in loose-fitting clothing.
The image lets your clinician see the pelvic rotation in context. Rather than looking at the pelvis on its own, they can follow the chain of compensation all the way through your body and understand where the loading problems begin.
Thinking of travelling to London and want to know if standing imaging could explain your symptoms? Talk to our team at no cost.
Book a free video consultationWhen MRI is the better tool: EOS is excellent at showing bones, joints and whole-body alignment. If your clinician suspects a soft-tissue problem, such as a labral tear, a disc problem or nerve compression, MRI is usually the more suitable scan. The two work together. They do not compete.
How is a rotated pelvis usually managed?
Management depends entirely on the cause, how severe it is and how much it affects your daily life. ScanAlign is a diagnostic imaging clinic, not a treatment provider, so we do not prescribe exercises or therapies. What we can do is give you and your treating clinician a clear, accurate picture of what is happening in your body under load.
Common approaches that clinicians and physiotherapists use for pelvic torsion include targeted muscle strengthening, manual therapy, gait retraining and, in some cases, orthotics. The right approach depends on having the right diagnosis first. That is where accurate standing imaging fits in.
So before you start treatment, or change the treatment you are on, it is worth getting a detailed diagnosis. Knowing whether the cause sits in the pelvis, the legs or the spine changes what will actually help you.
You can learn more about how hip alignment is assessed at ScanAlign, or read about how the spine makes up for pelvic problems.
Frequently asked questions about a rotated pelvis
Yes. When the pelvis rotates, the spine has to curve or twist to make up for it. This puts uneven load on the muscles, discs and joints of the lower back, often on one side more than the other.
Common signs include back or hip pain on one side, a feeling that one leg is shorter, shoes that wear unevenly, or trouble sitting comfortably for long periods. A standing, weight-bearing scan is the most reliable way to confirm the rotation.
No. A pelvic tilt means the whole pelvis tips forward or backward. A rotated pelvis, or pelvic torsion, means one side has twisted forward while the other sits further back. Both can happen together.
Many people see improvement with the right mix of physiotherapy, strengthening and manual therapy. The first step is getting an accurate diagnosis, so your clinician knows exactly what they are working with.
No referral is needed. ScanAlign is a private, self-pay clinic. You can book directly. We recommend starting with a free video consultation so our team can confirm the scan is right for you.
An EOS scan uses about 90% less radiation than a standard X-ray, around ten times less. It is one of the lowest-dose imaging methods available for checking the skeleton.
Most standard X-rays are taken lying down. This removes gravity and lets the muscles relax. A mild rotation can correct itself for a while on the table, so the image looks normal even though the problem is there when you stand.
It can. Pelvic rotation changes the angle of the thigh bone. This changes how the kneecap tracks and how weight is spread through the knee joint. Some people are treated for a knee problem when the root cause is in the pelvis.
For patients travelling from abroad, the price is confirmed during the free video consultation. You can find more details on our FAQs page.
You stand still inside the scanner for under a minute while the machine captures a full-length image. There is no tunnel, no noise and no injections. You wear loose-fitting clothing with no metal. The whole visit is simple and quick. More details are on our what to expect page.
Wondering if a pelvic rotation is behind your pain?
A free video consultation with our team, from wherever you are, can help you understand whether a standing EOS scan in London is the right next step.
Book a free video consultationSources
- Dubousset, J. et al. "EOS: A new imaging concept." European Spine Journal, 2010. Overview of EOS low-dose biplanar imaging for full-body skeletal assessment.
- NHS. "Back pain: causes, treatment and prevention." nhs.uk. General guidance on musculoskeletal back pain and when to seek imaging.
- Legaye, J. et al. "Pelvic incidence: a fundamental pelvic parameter for three-dimensional regulation of spinal sagittal curves." European Spine Journal, 1998. Research on the relationship between pelvic position and spinal alignment.
Written by Abbas Dhami (Specialist Diagnostic Radiographer), ScanAlign, 19 Harley Street, London.
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.