Understanding Trigger Points: What Those Muscle Knots Really Are

If you've ever felt a tender, tight knot in your shoulder, neck, or back and wondered what it is and why it hurts, you're experiencing a trigger point. These hyperirritable spots in tight bands of muscle are one of the most common sources of musculoskeletal pain — and also one of the most misunderstood.

As a Registered Massage Therapist specializing in pain management in South Etobicoke, I treat trigger points every day. Understanding what they are and how they work can help you understand why they cause pain and how massage therapy can help.

What Is a Trigger Point?

A trigger point is a hyperirritable spot within a taut band of skeletal muscle. When pressed, it produces pain locally and often refers pain to other areas. Trigger points can be:

• Active: Cause pain at rest and with movement; the pain is ongoing
• Latent: Don't cause spontaneous pain, but are tender when pressed and can restrict movement or cause weakness

Trigger points can develop in any skeletal muscle, but they're most commonly found in the neck, shoulders, upper back, lower back, and hips.

What Causes Trigger Points?

Trigger points develop through several mechanisms:

Muscle Overload

When a muscle is asked to do more than it's conditioned for — whether through a sudden burst of activity, repetitive strain, or sustained contraction — the muscle fibres can become overloaded, leading to trigger point formation. This is common in:

• Athletes pushing beyond their training level
• Desk workers maintaining sustained postures
• Manual labourers performing repetitive movements
• Anyone suddenly increasing their activity level

Sustained Tension

Muscles held in a state of contraction for extended periods — like your neck and shoulder muscles when you're hunched over a computer — are prime candidates for trigger points. The sustained contraction reduces blood flow and leads to biochemical changes in the muscle.

Direct Trauma

A blow, fall, or sudden stretch can cause micro-damage to muscle fibres, leading to trigger point development as part of the healing process.

Postural Strain

Poor posture creates sustained, asymmetrical tension in muscles, leading to trigger points in the overworked muscles. Forward head posture, rounded shoulders, and anterior pelvic tilt all contribute.

Stress and Emotional Tension

Emotional stress causes unconscious muscle tension, particularly in the neck, shoulders, and jaw. Over time, this chronic tension leads to trigger point formation.

Nutritional Deficiencies

Deficiencies in certain nutrients — particularly vitamin D, B vitamins, magnesium, and iron — can make muscles more susceptible to trigger points.

The Science: What's Happening in the Muscle

When a trigger point forms, a complex biochemical and neurological process occurs:

The Energy Crisis Theory

When a muscle fibre is held in sustained contraction, it compresses the blood vessels that supply it, reducing blood flow. This reduces oxygen and nutrient delivery while waste products accumulate. The muscle needs energy (ATP) to relax, but the reduced blood flow creates an energy crisis — the muscle can't get the ATP it needs to release the contraction. This creates a vicious cycle: sustained contraction reduces blood flow, reduced blood flow prevents relaxation, and the contraction continues.

Referred Pain

One of the most fascinating aspects of trigger points is their ability to refer pain to other areas. A trigger point in your upper trapezius (shoulder) can cause a headache at your temple. A trigger point in your gluteal muscles can send pain down your leg, mimicking sciatica.

This referred pain follows predictable patterns that have been mapped extensively. As a massage therapist, I use these patterns to identify which trigger points are causing your pain, even when the pain is felt far from the actual trigger point.

Common Trigger Point Patterns

Upper Trapezius

• Location: Top of the shoulder
• Refers pain to: The side of the neck, temple, and behind the ear
• Common cause: Forward head posture, stress, phone cradling
• Related condition: Tension headaches

Levator Scapulae

• Location: Side of the neck, where it meets the shoulder
• Refers pain to: The angle of the neck and top of the shoulder blade
• Common cause: Desk work, sleeping with poor pillow support
• Related condition: Stiff neck, neck pain

Masseter (Jaw)

• Location: Cheek muscle
• Refers pain to: The jaw, teeth, and ear
• Common cause: Teeth grinding, jaw clenching
• Related condition: TMJ dysfunction

Piriformis

• Location: Deep in the buttock
• Refers pain to: The buttock, back of the thigh, and down the leg
• Common cause: Prolonged sitting, running
• Related condition: Piriformis syndrome, sciatica-like symptoms

Quadratus Lumborum

• Location: Lower back, beside the spine
• Refers pain to: The lower back, hip, and buttock
• Common cause: Prolonged sitting, asymmetrical standing
• Related condition: Lower back pain

How Massage Therapy Treats Trigger Points

Massage therapy is one of the most effective treatments for trigger points:

Direct Pressure (Ischemic Compression)

I apply sustained pressure directly to the trigger point. This initially reduces blood flow (ischemia), and when the pressure is released, fresh blood rushes in, flushing out waste products and delivering oxygen and nutrients. The sustained pressure also interrupts the neurological feedback loop maintaining the contraction.

Deep Stroking Massage

Slow, deep strokes along the taut band of muscle help lengthen the contracted fibres and restore normal blood flow. This technique is particularly effective when combined with heat therapy.

Positional Release

For particularly sensitive trigger points, I use positional release — moving the affected muscle to a position of comfort where the trigger point is under no tension, then holding that position until the nervous system resets and the muscle relaxes.

Combined Approach

Most treatment sessions use a combination of these techniques, along with stretching, heat, and movement. I also address contributing factors like postural imbalances and muscle weakness that caused the trigger points to develop in the first place.

Self-Care for Trigger Points

Self-Massage

You can treat some trigger points yourself using a tennis ball or massage ball. Place the ball on the trigger point, lean against a wall, and apply sustained pressure for 30–60 seconds. Don't press so hard that you brace against the pain — the pressure should be firm but tolerable.

Heat Therapy

Warm compresses or a warm bath increase blood flow to tight muscles, making them more responsive to treatment.

Stretching

After treating a trigger point, gentle stretching of the affected muscle helps restore normal length. Hold stretches for 30 seconds and never force past mild discomfort.

Movement

Regular, varied movement prevents the sustained contractions that lead to trigger points. If you sit for work, get up and move frequently.

When to See a Professional

While self-care helps, trigger points that have been present for months or years — or that refer pain to other areas — require professional treatment. If you're experiencing persistent pain, headaches, or restricted movement, book a massage therapy session with me or Sebastian at The Fixx. We can identify and deactivate the trigger points causing your pain and address the underlying patterns that created them.

Trigger points are complex, but they're also highly treatable. With the right combination of professional treatment and self-care, those painful muscle knots can become a thing of the past.