15/04/2026
Shoulder pain is a common presentation at my clinic. Symptoms can include sharp pain when raising the arm to one a cupboard, hanging the washing etc. The pain, if chronic, of then leads to frozen shoulder because you are protecting yourself from pain. It can be debilitating but it doesn’t need to be. Have a read of this article and come and see me to get back on track.
For appointments you can call me on 0482 722 373 or book online via the link on my page.
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Marion
The Reaching Pinch: Why Raising Your Arm Feels Like a Knife 🛑🦴
Do you experience a sharp, blinding, catching pain right at the top of your shoulder every time you try to put on a jacket, wash your hair, or reach for a high shelf in the kitchen? Does it feel like something is physically "pinching" or "snapping" deep inside the joint?
Most people immediately panic, assuming they have severely torn their rotator cuff or that they are suffering from irreversible arthritis and "old age." But if your shoulder only hurts at a specific angle when reaching up, your joint might be perfectly healthy. The problem isn't your shoulder; the problem is the shape of your upper spine! Welcome to Subacromial Impingement caused by Thoracic Kyphosis. Let’s dive deeply into the elite 3D anatomical map above to see the bone-on-bone collision you are triggering.
The Anatomy: The Biological Gap
Your shoulder joint has a hard bony "roof" called the Acromion. Traveling directly under this bony roof is your Rotator Cuff tendon (Supraspinatus) and a tiny fluid-filled cushion (the Bursa sac). Crucially, your entire shoulder complex rests on top of your ribcage.
[Getty Images: Anterior anatomical view of the subacromial space showing the humerus, acromion, and the supraspinatus tendon]
The Biomechanics of the Glitch
When you slouch at a desk or look down at your phone for years, your upper back severely rounds forward into a slouched "C" shape. Because your shoulder blade rests on your back, this slouched posture physically tilts your entire shoulder joint FORWARD and DOWN! It completely closes the tiny, vital biological gap inside the joint.
The Consequence: The Bone Vice
When you try to lift your arm to reach a shelf, there is absolutely no room left in the joint! The heavy arm bone violently smashes upward (the massive green compression arrow), brutally crushing the delicate tendon directly against the hard bone roof of your shoulder (the vibrant glowing red and white zone)! The sharp, stabbing pain isn't a torn muscle; it is your soft connective tissue being pulverized and ground like meat in a bone vice!
[Shutterstock: High-definition 3D microscopic render showing severe mechanical compression, fraying, and inflammation of a tendon caught between bony structures]
How to Break the Cycle
Stop Stretching the Shoulder: If your shoulder hurts when reaching, DO NOT force it through the pain! You are actively grinding and fraying the tendon against the bone.
Foam Roll the Mid-Back: You must fix the foundation! Lie on a foam roller placed exactly between your shoulder blades and gently lean back. Flattening the upper spine instantly tilts the shoulder blade back into position, opening the biological gap!
The Doorway Pec Stretch: Your shoulders are pulled forward because your chest muscles are too tight. Stand in a doorway, place your forearms on the frame, and stretch your chest daily to let the shoulder blades glide backward, stopping the bone crush permanently.
Save this detailed structural breakdown to save your shoulders, and tag someone with bad posture! 👇
