Primary vs secondary trigger points

A primary trigger point develops directly from mechanical overload of its own muscle. A secondary (or satellite) trigger point develops in a muscle that lies within the referral zone of a primary one, or in synergists and antagonists compensating for the affected muscle.

Clinically, this means treating only the most painful spot often produces partial, short-lived relief. Identifying and addressing the primary driver — frequently in a different muscle than the one the patient points to — is what produces durable change.