The Science Behind Trigger Points and How Physiotherapy Eases Them

Trigger points—commonly referred to as “muscle knots”—are small, sensitive areas of muscle fibers that can cause localized pain or radiate discomfort elsewhere. These points are a major contributor to myofascial pain syndrome, tension, and limited mobility. Physiotherapists are trained to identify and treat trigger points using specialized, evidence-based techniques.

What Are Trigger Points?

A trigger point is a hyperirritable spot in a tight band of skeletal muscle. It feels like a small nodule and is painful when compressed. There are two types:

Active: Always painful and may refer pain to other areas.

Latent: Not painful unless touched but may limit range of motion or cause muscle weakness.

What Causes Trigger Points?

Repetitive stress or overuse

Poor posture

Emotional or physical stress

Trauma or muscle strain

Sedentary lifestyle

Symptoms of Trigger Points

Deep aching or burning in muscle

Stiffness or restricted range of motion

Referred pain (e.g., neck trigger point causing a headache)

Sleep disturbances due to discomfort

The Science of Trigger Point Physiology

Trigger points are thought to involve:

Dysfunctional motor endplates

Local ischemia (restricted blood flow)

Metabolic buildup

Inflammatory responses in the fascia

These physiological changes create a feedback loop of pain, tightness, and dysfunction.

How Physiotherapy Treats Trigger Points

Manual therapy: Sustained pressure (trigger point release) to deactivate knots.

Dry needling: Thin needles are inserted into the trigger point to relieve tension and improve blood flow.

Myofascial release: Gentle stretching of the fascia to restore movement.

Corrective exercises: Address posture, weakness, and joint mobility.

Breathing and relaxation: To reduce nervous system hyperactivity and muscular tension.

At-Home Support

Use of massage balls or foam rollers

Gentle stretching and mobility work

Heat therapy to promote relaxation

Conclusion

Trigger points may be small, but their impact on comfort and function can be significant. Physiotherapy offers a precise, science-based approach to locating and releasing these pain generators, restoring freedom of movement and daily comfort.