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Pain patterns

Sciatica: which trigger points cause it and how to treat them

Sciatica explained from a myofascial point of view: which muscles refer pain into the area, the order to examine them in, and the findings that point away from trigger points.

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What the pain feels like

True radicular pain follows a specific dermatome and is often accompanied by neurological signs. Many patients labeled 'sciatic' have a myofascial referral pattern instead — most commonly from piriformis or gluteus medius — with no nerve root involvement on careful examination.

Muscles to check first

Gluteus Minimus — Lateral leg from the hip to the foot — the most striking 'sciatica mimic' in the gluteal group.

Semitendinosus — Buttock and posteromedial thigh pain.

Biceps Femoris — Posterior knee crease and lateral hamstring pain.

Piriformis — Deep buttock pain, sacroiliac region, sometimes down the posterior thigh in a sciatica-like pattern but typically stopping above the knee.

Gluteus Maximus — Buttock and sacroiliac region; tail-bone-like pain when sitting.

How to work through them

Work the muscles in the order above. Treat one muscle fully — locate the taut band, hold sustained pressure until the ache eases, then take the muscle through its full range once — before moving to the next. Re-test the painful movement after each muscle so you can tell which one is actually driving the pattern: the muscles most often responsible here are Gluteus Minimus, Semitendinosus and Biceps Femoris.

If two or three muscles each give partial relief, that is the normal picture in a long-standing pattern; expect to revisit them over several sessions rather than resolving everything in one.

When it is not myofascial

Myofascial referral is a pattern of muscular origin, and it behaves like one: pressure on a specific spot reproduces the familiar pain, the pain moves with load and position, and it eases after release and movement. Findings that do not behave that way belong to a different problem.

Seek assessment rather than self-treating when pain is constant and unchanged by position, wakes you at night without a mechanical trigger, follows a clear dermatome with numbness or weakness, or comes with fever, unexplained weight loss, or a recent significant injury. The same applies when four to six weeks of consistent self-care produces no change at all.

Symptoms covered

Studies cited

Every claim in this article traces back to one of the sources below.

  1. Simons & TravellMyofascial Pain and Dysfunction: The Trigger Point Manual (2nd ed.). Williams & Wilkins, Baltimore
  2. Simons 2004Review of enigmatic myofascial trigger points as a common cause of enigmatic musculoskeletal pain and dysfunction. J Electromyogr Kinesiol 2004;14(1):95-107
  3. Shah 2008Biochemicals associated with pain and inflammation are elevated in sites near to and remote from active myofascial trigger points. Arch Phys Med Rehabil 2008;89(1):16-23
  4. Cummings 2001Needling therapies in the management of myofascial trigger point pain: a systematic review. Arch Phys Med Rehabil 2001;82(7):986-92

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