Lower Back Pain: A Bodyworker's Guide to the Most Common Culprits

Quadratus lumborum (QL) — the 'I can't stand up straight' muscle

The QL sits between your lowest rib and the top of your pelvis, on either side of the spine. It stabilizes the lumbar spine, helps you side-bend, and helps you hike your hip when you walk. When it locks up (usually after sitting, lifting, or carrying kids on one hip), it pulls the pelvis up on that side and makes the low back feel like a vise. People often describe it as 'my back went out.'

The classic QL pattern: deep, one-sided ache in the low back, worse with prolonged sitting, worse turning over in bed, worse getting out of a car. Coughing or sneezing lights it up. Bending forward feels okay, bending backward or to the opposite side is sharp.

QL release is one of the most satisfying pieces of bodywork we do. Skilled manual therapy plus a specific home mobility (hip hikes, side-lying breathing, targeted psoas release on the same side) typically calms it down within one to three sessions.

Gluteus medius — the deceiver

The glute medius is the muscle on the side of your hip. It stabilizes the pelvis when you're standing on one leg — which is what walking is, over and over. A weak or trigger-point-loaded glute medius refers pain into the low back and outer hip in a pattern that fools almost everyone. People are convinced they have a spine problem or a disc issue; a two-minute palpation exam usually finds the driver in the side of the hip.

This pattern is epidemic in people who sit for a living. The glutes go to sleep, the hip flexors shorten, and the low back muscles pick up the stability job the glutes should be doing. The fix is trigger-point release in the glute medius and piriformis, hip flexor length work, and specific loading — glute bridges, side-lying leg raises with correct form, single-leg balance work.

Psoas and iliacus — the desk-job duo

The psoas runs from the front of your lumbar spine, through the pelvis, to the top of your femur. The iliacus lines the inside of the pelvic bowl and blends with the psoas as they cross the hip. Together they are your primary hip flexors — and sitting shortens them, all day, every day.

Shortened hip flexors tilt the pelvis anteriorly, which cranks the lumbar spine into extension and cramps the small facet joints at the back of each vertebra. This is why 'my back hurts when I stand up after sitting all day' is one of the most common complaints we hear. Release the psoas, restore hip extension range, wake up the glutes, and the low back frequently quiets down without ever being directly touched.

Psoas work is skilled work. It requires slow, patient, communicative pressure through the abdominal wall from a therapist trained in this specific technique. It is not appropriate for everyone (early pregnancy, abdominal surgery history, aortic issues, and certain digestive conditions require modification or avoidance), which is why intake matters.

SI joint dysfunction

We wrote a whole dedicated article on the SI joint — see the linked piece below. In brief: SI joint pain is usually a stability problem (weak glute medius and deep core, overactive QL) rather than a mobility problem, and adjustment or manipulation without addressing the muscular pattern that keeps pulling the joint out of position tends not to hold. Combining manual work, PEMF for the inflammatory component, and specific re-loading is what we've seen produce lasting change.

Thoracolumbar fascia — the connective sheet everyone forgets

The thoracolumbar fascia is a diamond-shaped sheet of dense connective tissue that spans the low back, connecting the lats above to the glutes below and transmitting force across the whole system. When it becomes dehydrated or restricted, it acts like a shrink-wrap on the low back — nothing moves well, everything hurts, and stretching alone doesn't touch it.

Myofascial glides and, when appropriate, instrument-assisted work (Graston, cupping) can rehydrate and mobilize this sheet in ways pure muscle work cannot.

Sciatica-pattern pain: usually not what people think

'Sciatica' has become a catch-all term for any pain that shoots down the back of the leg. Actual sciatic nerve compression from a disc is real, but it is a minority of the leg-pain cases we see. Far more common: piriformis syndrome (the sciatic nerve is entrapped by a tight piriformis muscle in the deep buttock), glute medius trigger point referral (down the outer thigh), and QL referral (into the upper glute and lateral hip).

The difference matters. Genuine radiculopathy from a disc needs medical management and often imaging. Muscular referral responds beautifully to soft tissue work. A skilled clinician can usually differentiate them in a few tests during intake.

What soft tissue therapy actually addresses in low back pain

Skilled bodywork can down-regulate the pain-generating muscles (QL, glutes, psoas, thoracolumbar fascia), restore hip and thoracic mobility that the low back has been compensating for, and give the nervous system enough safety signal to stop guarding. That last piece is often the missing link between 'adjustments that don't hold' and 'PT exercises that don't help' — the nervous system has to feel safe before the tissue lets go and the exercises can actually build the pattern you're training.

The imaging question

Current clinical guidelines from the American College of Physicians and NICE do not recommend imaging for non-specific low back pain in the first 4-6 weeks unless red flags are present. The reason: imaging almost always finds age-appropriate 'abnormalities' — disc bulges, degenerative changes, mild stenosis — that are present in the majority of pain-free adults over 40 and are often not the actual pain generator. Chasing an imaging finding that isn't causing the pain can lead to interventions that make things worse.

Red flags that do warrant imaging and medical evaluation: unexplained weight loss, fever, history of cancer, IV drug use, trauma, progressive neurological symptoms (weakness, foot drop, saddle anesthesia, bowel/bladder changes), or pain that is worse at night and doesn't change with position.