Sacroiliac Joint Pain

A Common Cause of Low Back Pain. And it’s not your Back!

Sacro –Iliac Joint Dysfunction

In many cases of back pain we see and treat the cause is not the back or spine at all but instead is from a joint or joints in the pelvis-the Sacro-Iliac Joint (SIJ).

Patients have often suffered prolonged pain and may have been incorrectly diagnosed along the way with sciatica, a disc problem or told it is muscle spasm. They are then given the wrong advice regarding exercises etc. which often aggravates the problem further.

Symptoms may start gradually with no known cause or there be a sudden onset associated with pregnancy, a poor sitting position or a fall-especially if there has been a sudden force through the hip or bottom.

All these are common causes of SIJ problems.

Sacroiliac joint of the male pelvis

Sacro-iliac joint

The Sacro- iliac joints are located between the sacrum, the wedge-shaped bone at the base of the spine and the two pelvic bones (ilium).

One of the joints may become disrupted or strained causing inflammation and subsequent pain. Muscles around the joint may spasm, become weak or develop painful knots or trigger points.The joint surfaces are rough and interlock together for stability but they can move. This is especially the case in late stage pregnancy when hormones helps ‘soften’ the ligaments to allow the baby to pass through the pelvis more easily.

As the pelvis it is the centre of the body and all forces through the leg and hip come through to the spine through the SIJ even slight changes can cause severe pain and weakness in the low back, groin and hip and even refer as far as the foot or shoulder.

Diagnosis with x-ray or even MRI can be difficult as unless there is severe degeneration or fusing of the joint it usually appears normal.

Sacroiliac Joint Dysfunction Animation – Everything You Need To Know – Dr. Nabil Ebraheim, M.D. 

About SIJ dysfunction

Patients usually complain of pain on one side around the very base of the back and into the buttock or side.

Aggravated by:

  • Turning over in bed
  • Moving from sitting to standing
  • Getting in and out of a car
  • Walking or stairs
  • Lying supine (on the back) with legs out straight. 

This may be a sudden force or trauma or overuse with repetitive movements or positions.

  • Collison when driving with the foot on the pedal
  • Twisting and lifting
  • Pregnancy
  • Excessive stress post pregnancy (car seats, bathing baby, lifting and carrying)
  • Long term issues in knees, hips or ankle. (Producing one sided weakness0
  • Landing heavily on one leg.
  • Prolonged sitting-especially with twisting 

Our physiotherapists initially take a comprehensive history of the problem, the symptoms, aggravating factors etc. which is often sufficient information for us to suspect an SIJ problem.

We then conduct specialised tests to screen the spine, pelvis, hips and sacro- iliac joint to produce an accurate diagnosis and treatment plan.

In severe cases, especially in pregnancy when instability is an issue a belt or support may be necessary to compress and stabilize the pelvis.

Physiotherapy uses many techniques and treatments to regain the correct balance of joints and muscles in the pelvis  including exercises, mobilisation and taping.

Regaining the strength and stability of the core supporting muscles is essential and Pilates type exercises are excellent at focusing on these-whether in a class or one to one with the physiotherapist.

So if you suspect your back pain is caused by your sacro- iliac joint but have had no diagnosis or effective treatment then make an appointment with one of our experienced physiotherapists at Physio Answers and get the problem sorted-now! Call us on 0203 538 3808 

What people say about us

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Lubna Nshewat profile picture
Lubna Nshewat
3 November 2026
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Leena is an absolutely amazing physiotherapist! She is incredibly friendly, caring, and professional. After visiting other places where my problem wasn't properly identified, she was able to quickly understand the issue and provide the right treatment. You can genuinely see how much she loves her work and cares about her patients. She puts her heart into everything she does, making sure everyone receives the best possible care. The centre is also very well-maintained and professionally run. Highly recommended! ❤️
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Jane Barham
1 November 2026
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I’ve had three sessions with Basil (at Southend branch) so far and I’m really impressed. Basil put me at ease straight away, and his balance of professionalism, clear explanations, and respectful care stood out. The hands-on work was always appropriate, and he explained exercises clearly, so I knew what to do at home. I’ve made great progress already and I’m now playing football without and pain at night. Professional, kind, and highly recommended
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Muhammad Hasher
30 October 2026
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I had appointment with leena and i highly recommend her she is sooooo nice and she guide me very well about my shoulder and neck injury i highly recommend her thankyou !!⭐️⭐️
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Wayne H
28 October 2026
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Joe has been brilliant at helping to ease my tennis elbow, utilising Acupuncture and advising some simple exercises to slowly build up the strength in my elbow again.
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AJ D
28 October 2026
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I came to Physio Answers with back and shoulder pain.. Joe Chamberlain was great, we talked through the issues and then set about options for how to improve my situation. A combination of strength exercises and some amazing tips and tricks has helped be greatly. The hands on treatments were super helpful as well, massage, trigger point release and acupuncture. Would absolutely recommend Joe if you’re having any issues!
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Angie Dulwich
27 October 2026
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Ann was incredible kind compassionate and really helped me after I was injured in a fall. She helped me start to feel better after 4 weeks in agony start to have hope for a slow recovery and gave me lots of amazing advice. I dont live in the area but I wouldnt hesitate to travel to see Ann again. Brilliant totally recommend xx
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Trevor “Daddy Gripper” Marquis
21 October 2026
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Good quality treatment and exercises to do at home and the gym.Mobility is much better, pain has reduced significantly.Very professional
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isobel yeomans
17 October 2026
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Requested last minute appt same day for neck pain and suspected muscle spasm. Basil was really friendly and helpful. As this was my first physio session, he explained the assessment process and ensured he got accurate information about my pain and anything that may have contributed towards it. He then used posture exercises and hands on examination to confirm the problem. Given I only had a 45 minute appt, Basil ensured he provided some hands on treatment to massage the area and also did some assisted stretches which helped me to get more movement in the area. I was also left with some exercises to complete. Basil explained everything patiently making sure I understood the problem and treatment and made sure I was comfortable throughout. Friendly reception staff to book appt also and accommodate a same day appt request. Would recommend to anybody needing treatment!
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Harold Adeniyi
5 October 2026
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I honestly cannot recommend Kajal highly enough! I came to her after dealing with nerve issues in my neck which were causing me a lot of pain, tingling and genuinely quite a bit of distress. At the time, I was really worried about whether I would get back to feeling normal again. Over the past 9 weeks, Kajal has been absolutely wonderful. She was incredibly knowledgeable, patient and reassuring throughout the whole process. She always took the time to explain what was going on, why we were doing certain exercises and what I could do myself to help with my recovery. What I appreciated most was how much confidence she gave me throughout the process. I never felt rushed or like I was just another appointment. She genuinely cared about my progress and adjusted things along the way based on how I was responding. I’m now back to 100% and completely pain free, which honestly feels amazing considering where I started. Kajal has been brilliant from start to finish and I’m incredibly grateful for all of her help. If you’re looking for a physio who is knowledgeable, caring, encouraging and genuinely invested in getting you better, I could not recommend her more highly. Thank you so much, Kajal!
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Daniela Montes
3 October 2026
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Five stars for Basil at Physio-Answers Southend. Basil truly listens and understands how stress and burnout manifest physically. His treatment made a massive difference in releasing the pain and stiffness in my body. I feel so much lighter and more comfortable.