Research & evidence
Latent vs active trigger points: why silent points still matter
Latent points do not hurt spontaneously but alter motor recruitment and lower pain thresholds — a plausible route from no symptoms to symptoms.
Published:
The distinction
An active point produces spontaneous pain the patient recognises. A latent point is silent until pressed: it still sits in a taut band, still refers pain on compression, but is not currently generating symptoms.
Latent points are common in people with no complaints at all, which is exactly why finding a tender spot is not sufficient to explain a patient's pain.
Measurable effects of a silent point
Experimental work on latent points describes increased local and referred sensitivity, altered muscle activation patterns with earlier fatigue and less efficient recruitment, and increased motor endplate noise.
So a latent point is not neutral: it changes how the region works and appears to lower the threshold at which normal load becomes symptomatic.
Clinical use
Ignore latent points when they do not reproduce the complaint, and revisit them when a case keeps relapsing or when performance and endurance are the issue rather than pain. In athletes and heavy manual workers they are often the reason a region fatigues asymmetrically.
The practical filter stays the same: does compression reproduce the pain the patient came in with?
Studies cited
Every claim in this article traces back to one of the sources below.
- Ge 2011 — Latent myofascial trigger points. Curr Pain Headache Rep 2011;15(5):386-92 ↗
- Simons 2004 — Review of enigmatic myofascial trigger points as a common cause of enigmatic musculoskeletal pain and dysfunction. J Electromyogr Kinesiol 2004;14(1):95-107 ↗
- Shah 2005 — An in vivo microanalytical technique for measuring the local biochemical milieu of human skeletal muscle. J Appl Physiol 2005;99(5):1977-84 ↗
- Simons & Travell — Myofascial Pain and Dysfunction: The Trigger Point Manual (2nd ed.). Williams & Wilkins, Baltimore ↗
