Trigger Point Therapy

Trigger points — commonly called "knots" — are the most common source of musculoskeletal pain, yet most people don't understand what they actually are or how they form. A trigger point is a hyperirritable spot within a taut band of muscle fiber that produces local pain, referred pain (pain felt in a different location), and restricted range of motion. Understanding trigger points transforms how you think about pain and how you communicate with your massage therapist about what you need.

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What a Trigger Point Actually Is

The Physiology

A trigger point forms when a small group of muscle fibers contracts and fails to release. The contracted fibers create a palpable nodule — the "knot" you can feel under the skin. These fibers are in a state of sustained contraction, consuming energy and oxygen without producing useful movement. The constant contraction compresses the local blood vessels, creating an oxygen-deprived environment that produces irritating metabolic waste products (including substance P and calcitonin gene-related peptide). These chemicals sensitize the local nerve endings, which signal pain — which causes more muscle guarding — which reinforces the trigger point. It's a self-sustaining cycle.

Active vs. Latent Trigger Points

Active trigger points cause pain without being pressed. They hurt at rest, hurt more with use, and refer pain to predictable locations. If your shoulder constantly aches even when you're not using it, an active trigger point in the upper trapezius or infraspinatus is a likely cause.

Latent trigger points only hurt when pressed directly. They don't cause spontaneous pain but they restrict range of motion and create stiffness. You might not know they're there until a therapist's thumb finds them. Latent trigger points are extremely common — most adults have dozens of them. They can activate (become painful) under stress, overuse, or fatigue.

Referred Pain Patterns

The most distinctive feature of trigger points is referred pain — pain felt somewhere other than where the trigger point is located. These patterns are remarkably consistent across people:

• Upper trapezius trigger points → pain up the side of the neck and behind the ear (tension headaches)

• Infraspinatus trigger points → pain down the front of the shoulder and upper arm

• Gluteus minimus trigger points → pain down the side of the leg mimicking sciatica

• SCM (neck) trigger points → pain behind the eye, dizziness, and ear pain

• Soleus (calf) trigger points → heel pain mimicking plantar fasciitis

This is why your massage therapist may work on your shoulder when you report arm pain, or on your calf when you report heel pain — they're treating the trigger point that's referring pain to your symptomatic area.

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How Trigger Point Therapy Works

Sustained Compression (Ischemic Compression)

The primary technique: the therapist locates the trigger point (a palpable nodule within a taut band) and applies sustained, moderate pressure directly on it. The pressure creates a temporary ischemia (blood flow restriction) in the already oxygen-deprived tissue. When the pressure is released after 20-90 seconds, blood floods back into the area, flushing out the accumulated metabolic waste and delivering fresh oxygen. The muscle fiber often releases during or immediately after this process.

The Pain Response

When a therapist presses a trigger point, you'll typically feel two things: local tenderness at the point itself, and referred pain radiating to another area. This referred pain pattern is actually diagnostic — if pressing a point in your shoulder reproduces the headache you've been having, the therapist has found the source. The sensation should be "good pain" — intense but clearly therapeutic. If it causes you to tense up or guard against the pressure, it's too much. Communicate with your therapist — see our communication guide.

Cross-Fiber Friction

Applied perpendicular to the muscle fiber direction, cross-fiber friction breaks the adhesions between fibers within and around the trigger point. This technique is more vigorous than sustained compression and may cause brief, sharp discomfort as adhesions separate. The immediate result is increased mobility in the muscle.

Positional Release

A gentler approach: the therapist positions your body to shorten the affected muscle, applies light pressure on the trigger point, and holds for 60-90 seconds. This "resets" the neurological signal that's maintaining the contraction. Positional release is less painful than direct compression and works well for sensitive areas and patients who find direct pressure too intense.

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Trigger Point Therapy vs. General Massage

Factor	Trigger Point Therapy	General Deep Tissue
Approach	Specific points targeted	Broad muscle groups
Duration per spot	20-90 seconds sustained pressure	Moving strokes across the muscle
Best for	Specific pain with referred patterns	General tension and adhesions
Discomfort level	Higher (concentrated pressure on sensitive points)	Moderate (distributed across larger area)
Post-session soreness	Localized, 24-48 hours	Generalized, 24-48 hours

In practice, skilled therapists integrate trigger point techniques into a broader combined session: deep tissue strokes to warm the area, then specific trigger point work on the identified nodules, followed by flushing strokes to promote circulation and recovery.

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Common Trigger Point Locations

• Neck: Upper trapezius, levator scapulae, SCM, suboccipitals — the most common trigger point sites in the body, contributing to headaches, neck pain, and shoulder tension.

• Lower back: Quadratus lumborum, erector spinae, gluteus medius — responsible for much of what gets diagnosed as "non-specific lower back pain."

• Hip: Gluteus medius, gluteus minimus, and the deep hip rotators — trigger points here commonly refer pain down the outside of the leg and are frequently mistaken for sciatica.

• Calves and shins: Gastrocnemius and soleus trigger points are common in runners and anyone who spends long hours on their feet, often referring pain into the heel or arch.

• Shoulders and upper back: Infraspinatus, rhomboids, and the trapezius frequently harbor trigger points in people who work at a desk, referring pain between the shoulder blades and down the arm.

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Frequently Asked Questions

Why does pressing on one spot cause pain somewhere else?

This is called referred pain, and it happens because trigger points follow well-documented referral patterns through the nervous system. A trigger point in the upper trapezius, for example, commonly refers pain up into the head, mimicking a headache. Understanding these patterns is exactly what lets a skilled therapist trace your symptom back to its actual source rather than only treating where it hurts.

How is trigger point therapy different from a regular deep tissue massage?

Deep tissue massage works broadly across a muscle or muscle group with sustained strokes. Trigger point therapy is more surgical — the therapist locates a specific hyperirritable nodule and applies sustained, focused pressure directly on it until it releases. Most sessions blend both approaches, as shown in the comparison above.

Can trigger points come back after treatment?

Yes, particularly if the underlying cause — poor posture, repetitive strain, or unmanaged stress — is never addressed. Trigger point therapy resolves the existing nodule, but without changes to the habits that created it, new trigger points often form in the same area within weeks. Pairing treatment with posture awareness and regular maintenance sessions produces far more durable results.