Understanding Trigger Points: Why That Knot in Your Shoulder Won’t Go Away

Almost everyone has experienced it — that persistent, tender knot sitting between your shoulder blade and spine that seems to return no matter how many times you press on it with a lacrosse ball or ask someone to dig their elbow into it. It’s been there for months, maybe years. It aches when you sit at your desk, flares up when you’re stressed, and provides only temporary relief when you attack it directly.

That knot has a clinical name: myofascial trigger point. And the reason it keeps coming back is that pressing on it — while it feels productive — doesn’t address why it formed in the first place.

What a Trigger Point Actually Is

A trigger point is a hyperirritable spot within a taut band of skeletal muscle. Under a microscope, it’s a cluster of muscle fibres locked in sustained contraction — the sarcomeres (the smallest contractile units of muscle) are stuck in their shortened position. They can’t release because they’re caught in a self-perpetuating neurological and metabolic cycle.

Here’s what happens at the cellular level: the sustained contraction compresses local blood vessels, reducing oxygen delivery to the area. Without adequate oxygen, the tissue can’t produce enough ATP (the energy molecule muscles need to both contract and relax). Without ATP, the muscle fibres can’t release from their contracted state. The sustained contraction continues compressing blood vessels, perpetuating the oxygen deficit. It’s a vicious cycle that can persist indefinitely without intervention.

This is why trigger points feel hard — they are literally a localised area of contracted tissue within an otherwise normal muscle.

Why That Specific Spot Between Your Shoulder Blades

The area between your shoulder blade and spine — the rhomboids and middle trapezius — is the most common location for trigger points, and the reason is biomechanical. These muscles are responsible for pulling your shoulder blades together and holding them in position against your ribcage. When your shoulders round forward (desk work, phone use, driving), these muscles are placed in a constant state of stretch under load.

They’re essentially performing an eccentric hold for hours every day — fighting against the weight of your arms and the pull of your shortened pectorals. This chronic overload creates the perfect conditions for trigger point development: sustained low-level contraction, reduced local circulation, and metabolic waste accumulation.

The irony is that these muscles feel “tight,” but they’re actually overlengthened and overworked. The trigger point is their distress signal — a protective contraction in response to being chronically overstretched.

Why Direct Pressure Alone Doesn’t Fix It

When you press on a trigger point — with your fingers, a ball, or a foam roller — you’re doing two things: temporarily overriding the pain signal and mechanically increasing local blood flow through compression and release. Both provide short-term relief. The pain diminishes, the area feels looser, and you think the problem is solved.

But you haven’t addressed the sustained neurological signal that’s keeping those muscle fibres contracted, and you haven’t changed the postural pattern that created the overload in the first place. Within hours to days, the cycle re-establishes itself and the knot returns.

Think of it this way: if you have a leak in your ceiling, putting a bucket underneath manages the symptom. Pressing on the trigger point is the bucket. Fixing the roof — addressing the postural cause and breaking the neurological cycle — is what actually resolves the problem.

How Professional Treatment Resolves Trigger Points

Effective trigger point treatment works on multiple levels simultaneously, which is why self-treatment has limited success.

Identifying the Primary Driver

A skilled therapist doesn’t just treat the trigger point — they identify what’s causing it. In the case of the common rhomboid trigger point, the primary driver is usually shortened pectorals and anterior deltoids pulling the shoulders forward. Treating the trigger point without releasing the pecs is treating the symptom, not the cause.

Ischaemic Compression

Sustained, calibrated pressure on the trigger point — held for 60-90 seconds at the appropriate intensity — creates a local ischaemic response followed by reactive hyperaemia (a rush of fresh blood) when pressure is released. This breaks the metabolic cycle by flooding the area with oxygen and flushing accumulated waste products. The pressure must be precise — too light has no effect, too aggressive activates a protective guarding response that makes the trigger point worse.

Active Release Through Movement

While maintaining contact with the trigger point, the therapist guides the muscle through its full range of motion. This combination of sustained pressure and active lengthening physically separates the stuck sarcomeres and restores normal sliding between tissue layers. This is fundamentally different from static pressure — the movement component is what creates lasting change.

Addressing the Kinetic Chain

Trigger points rarely exist in isolation. The rhomboid trigger point typically coexists with trigger points in the upper trapezius, levator scapulae, and infraspinatus — all muscles affected by the same postural pattern. Treating only the most symptomatic point while ignoring its neighbours leads to incomplete resolution and rapid recurrence.

What You Can Do Between Sessions

While self-treatment has limitations, there are effective strategies for managing trigger points between professional sessions:

• Address posture, not the knot — thoracic extension exercises and doorway pec stretches reduce the load on the affected muscles more effectively than pressing on the trigger point itself
• Heat, not ice — trigger points respond better to heat (which increases local blood flow and relaxes muscle tissue) than ice (which causes further vasoconstriction in already oxygen-deprived tissue)
• Movement breaks — standing, reaching overhead, and performing shoulder blade squeezes every 30-45 minutes prevents the sustained loading that feeds trigger points
• Targeted strengthening — wall slides, band pull-aparts, and prone Y-raises strengthen the posterior chain muscles, improving their capacity to handle postural load without developing trigger points

Timeline for Resolution

A trigger point that’s been active for weeks typically resolves in one to two professional sessions combined with postural modification. One that’s been present for months may require three to four sessions. Chronic trigger points that have been active for years — with established referral patterns and secondary trigger points — may take six to eight sessions to fully resolve, though significant improvement is usually felt within the first two.

The key variable is compliance with postural and exercise recommendations between sessions. The fastest resolution happens when professional treatment is combined with daily postural work. The slowest — and most frustrating — happens when treatment is relied upon exclusively while the causative factors remain unchanged.