Why a sore shoulder ends up on a prescription pad

I used to believe the pre-surgery checklist was purely mechanical: Did you stop eating at midnight? Do you have a ride home? It took me an embarrassingly long time to see the invisible item on that list: the accumulated static in your nervous system. The common wisdom is that high pre-surgery anxiety guarantees you’ll need more opioids afterward. It’s a neat, linear story. It’s also wrong. The anxiety isn't the cause; it's just the first check engine light.

You know the feeling. It’s not just the logical fear of the procedure. It’s the low hum of dread that starts weeks before, making you feel tired but wired at 11 PM. You find yourself standing in front of an open fridge with no appetite, rereading the same pre-op instruction sheet for the tenth time. Sleep is a battle; you feel exhausted but can’t rest, waking up at 3am with a jolt. There's a tightness in your jaw that won't release, even in the shower. This isn't just "nerves." It's your body running a background process of high alert, and it has been for months, maybe years. The surgery is just the event that’s making the hum audible.

Common Questions

What is allostatic load?

Think of it as the wear-and-tear on your body from chronic stress. It’s the biological cost of adapting to a world that never quite lets you off the hook. A high allostatic load means your internal systems—from stress hormones to inflammation—are already working overtime before a single scalpel is lifted.

Does anxiety actually cause more pain?

Not directly. But a dysregulated nervous system, which often presents as anxiety, has a lower threshold for what it interprets as a threat. The pain signals are the same; your brain’s alarm system is just set to a more sensitive tripwire, making the experience of that pain more intense and harder to tolerate.

Why can't I just 'relax' before surgery?

Telling a nervous system already buckling under a high allostatic load to “just relax” is like telling a car with a busted transmission to “just drive smoothly.” Relaxation is a physiological state, not a decision. Your capacity to enter that state is a resource, and it may already be depleted.

Your system was overloaded before you got the diagnosis

The idea that pre-op anxiety directly causes post-op pain is convenient. It puts the onus on you to manage your feelings. But your anxiety and your opioid needs are more like two different dials showing the same reading: systemic overload. Pre-surgery anxiety doesn't predict your opioid use. They are two different weather vanes spinning in the same storm your nervous-system-regulation was already weathering.

The real predictor is your baseline state. How much load was your system already carrying before you were told you needed a rotator cuff repair? Years of poor sleep, chronic work stress, and unresolved inflammation don't just vanish because you have a surgery date. They form the biological context into which the acute stress of surgery arrives. That context is your allostatic load. When it's high, your ability to manage inflammation, regulate pain perception, and recover is already compromised.

The HPA axis has no ‘surgery day’ exception

Let's get nerdy for a second. Your body’s primary stress response is run by the HPA axis—the communication loop between your brain (hypothalamus, pituitary) and your adrenal glands. When you’re under chronic stress, this system gets. weird. Instead of a sharp, effective spike of cortisol to handle a threat, you might end up with a high, flat, dysfunctional baseline. Your body is marinating in stress hormones.

When the acute, major stress of surgery hits a system like this, the response is blunted and ineffective. Your body can’t mount the powerful, targeted anti-inflammatory defense it needs. Pain signals are amplified because the circuits that would normally dampen them are exhausted. Your brain’s ability to distinguish between "this is a threat" and "this is healing" is shot. This is what it means to be structurally fragile. The anxiety was a symptom of that fragility. The high pain level is another.

Your nervous system doesn't have a 'surgery' setting. It just has 'safe' and 'threat'.

Pain is an opinion, and your brain is biased

Pain isn’t a pure, objective signal sent from your shoulder to your brain. Pain is an output of the brain, a conclusion it reaches based on sensory input, past experience, and—most importantly—its current assessment of safety. This process of sensing and interpreting the body's internal state is called interoception.

When your allostatic load is high, your interoceptive accuracy plummets. Your brain, already primed for threat, is more likely to interpret any ambiguous sensation as "DANGER, MAXIMUM PAIN." It loses the nuance between the sharp pain of an incision and the dull ache of inflammation. It all just gets bucketed as a five-alarm fire. Reaching for the opioid button isn't a failure of willpower; it’s a predictable outcome when your brain's alarm system is screaming and you haven't been given any other tool to turn down the volume.

You prepare for surgery by rebuilding the baseline

The time between diagnosis and surgery isn’t for waiting. It’s for renovating. The goal isn't to eliminate anxiety—an impossible and frankly unhelpful task. The goal is to lower your allostatic load so your system has the resources to handle the event. This isn’t about positive thinking. It's about giving your physiology a fighting chance.

It means deliberately practicing down-regulation. It means getting sunlight in your eyes in the morning to anchor your circadian rhythm, which governs your inflammatory and hormonal cycles. It means using a tool like the Journal to practice affect labeling—putting words to feelings—which helps the prefrontal cortex put the brakes on the amygdala’s runaway train. These aren't self-care luxuries; they are fundamental maintenance for the system that will be tasked with healing you. I’ve come to see this pre-operative window as one of the most important, and most wasted, opportunities for intervention.

What to do this week

1. Start a two-line journal entry. Every night, write down two things: "What I feel in my mind:" and "Where I feel it in my body:". Don't analyze it. Just notice. This is the first step to rebuilding your interoceptive accuracy.
2. Practice physiological sighs. At three random points during your day, take two sharp inhales through your nose followed by one long, slow exhale through your mouth. This is one of the fastest ways to tell your brainstem you are safe. Find a guided version in the free Hacks.
3. Get 10 minutes of morning light. Before you look at a screen, get outside. No phone, no sunglasses. The photons hitting your retina are a primary signal for resetting your HPA axis and anchoring your entire daily rhythm.
4. Eat protein at breakfast. Aim for 30 grams. Stable blood sugar is a form of nervous system stability. A protein-front-loaded day prevents the blood sugar rollercoaster that your already-taxed adrenals perceive as another source of stress.

Where this fits in the Kokorology system

This is the core principle of the entire Kokorology architecture. Symptoms—whether anxiety or pain—are readouts of your nervous system's state and capacity. Preparing for a major stressor like surgery isn't about mindset; it's about shoring up the foundations of your nervous system regulation. Practices in the Journal build your interoceptive awareness, while the protocols in Anchors give you repeatable tools to lower your allostatic load before the big day arrives.

Tonight's practice

Tonight's practice maps your baseline stress load before physical pain hits. You will track physical tension that comes from ongoing stress rather than an injury.

Where in my body am I carrying chronic tension right now that has nothing to do with a specific physical injury?

1. Rate your current overall physical stress on a scale of 1 to 5.
2. Spend 2 minutes scanning your jaw, shoulders, and stomach for tightness unrelated to physical movement.
3. Write down your score and any tight spots every evening for 4 days.
4. Compare your scores to see your baseline threat level before acute stressors occur.

Closing

The story that your emotions are the problem is a distraction. The real work is to look beneath the anxiety and see the strained architecture of a system that needs support, not judgment. Your body is not failing; it's communicating. The question is whether you are equipped to listen.

• Start with The Reset: If your system feels completely overwhelmed, begin with the structured 7-day program to lower your allostatic load inside The Reset.
• Practice with an Anchor: Target the root of the problem with a daily practice designed to improve your vagal tone and HPA axis function inside the Vagal Tone Anchor.
• Read the free guide: Get the foundational tools for nervous system regulation in the free 7-day guide.

TL;DR

The common belief that pre-surgery anxiety causes higher post-operative opioid use is a misunderstanding. Both the anxiety and the heightened pain are symptoms of the same underlying issue: a high allostatic load. Your nervous system was already overloaded before the surgery was even scheduled. Instead of trying to "manage anxiety," the more effective strategy is to use the pre-operative window to lower this chronic stress load, thereby improving your system's innate capacity to regulate inflammation, manage pain, and heal effectively.

Sources

• McEwen BS (2017). Neurobiological and Systemic Effects of Chronic Stress. Chronic Stress (Thousand Oaks).
• Pennebaker JW (2023). Journaling and the nervous system: from expressive writing to affect labeling. Curated meta-analyses and primary studies (1986–2023).
• Examine.com (2026). Leucine alone won't save muscle during immobilization. Examine.com Study Summaries.
• Critchley HD, Garfinkel SN (2017). Interoception and emotion. Current Opinion in Psychology.
• Tracey KJ (2002). The inflammatory reflex. Nature.