Why a pain clinic asks to see your bloodwork

CANDIDACY / METABOLIC HEALTH

It is the question that makes people sit back in the chair. You came about a knee, and somebody wants your A1C.

Because repair is an anabolic process

A tendon or a joint does not heal by being left alone. It heals by building — laying down collagen, growing new vessels, remodelling the result under load. That is construction work, and construction work runs on the materials available.

So the honest question is not whether platelet-rich plasma works. It is what it is being asked to work with.

The three things that decide that

• Insulin resistance and hyperinsulinaemia. A chronically elevated insulin signal shifts tissue toward storage and inflammation rather than repair. It also impairs microvascular delivery to entheses that were already the worst-perfused structures in the limb.
• Glycation. Advanced glycation end-products cross-link collagen abnormally. The tissue that forms is stiffer and fails at lower strain than what it replaced — which is why a diabetic tendon behaves differently under load even when it looks intact.
• Metainflammation. Visceral fat is endocrine tissue. It releases signaling molecules that hold cartilage and tendon in a degradative state regardless of how carefully you exercise.

What we actually look at

• Fasting glucose and A1C, and where it is available a fasting insulin
• A lipid panel read for triglyceride-to-HDL ratio rather than for total cholesterol
• Vitamin D, which affects both tendon healing and muscle function
• Thyroid function, because hypothyroidism independently alters tendon quality
• Inflammatory markers where an inflammatory arthropathy is on the differential
• Sleep — asked about properly, because most repair signaling is nocturnal

What we do with the answer

Not refuse you. Sequence you. If your A1C is 8.4 and you have three tendinopathies at once, the useful conversation is not which one to inject first — it is that you do not have three injuries, you have one systemic process with three expressions, and treating the terrain changes the odds on all of them.

Sometimes the sequence is metabolic work first and injection later. Sometimes it is both together because the pain is preventing the movement that the metabolic work requires. That is a judgment made with you, and it is made out loud.

Why nobody told you this before

Symptom-based silos. Pain goes to one specialty, blood sugar to another, sleep to nobody, and weight to a lecture. Each silo optimizes its own variable competently, no one owns the collision, and the patient is left assembling a picture from four partial views.

That is not a claim that anyone acted badly. It is a description of what a system built on short encounters and procedure codes reliably produces.

The part that is not a lecture

None of this is offered as advice about willpower. The food environment is engineered — acellular carbohydrates and industrial seed oils are the cheapest calories available because policy made them cheap, and they are concentrated where the alternatives are fewest. Shift work disrupts glycaemic control by design. Isolation raises inflammatory tone through mechanisms as measurable as any drug.

You did not choose most of the inputs. You can change some of them, and knowing which is worth more than being told to try harder.

The order we usually recommend

Not a protocol, because it depends on what is driving your case, but the shape is consistent.

• Establish the diagnosis properly first. A metabolic panel does not replace working out which structure hurts.
• Fix what is cheap and fast. Sleep opportunity, protein adequacy, nicotine, and the loading pattern that is re-injuring the tissue.
• Treat the tissue where the window matters. If pain is preventing the movement that the metabolic work needs, the injection comes earlier rather than later.
• Keep loading. Indefinitely, at a lower dose. Tendon capacity is a use-it-or-lose-it property and so is insulin sensitivity.

What changes when the terrain improves

Two things, and they compound. Collagen laid down under better glycaemic control is better collagen — less glycated, better cross-linked, tougher under strain. And the systemic inflammatory signal that was holding tissue in a degradative state falls, so the repair you provoke is not fighting a headwind the whole way.

People notice it as the injection that finally held, after two that did not. The difference was rarely the injection.

Where this sits against pain medication

There is a direct line from this page to the medication question. A nervous system asked to quieten needs sleep architecture that works, falling rather than rising inflammatory load, and enough restored function to move. Those are the same three things this page is about. Where they improve, the dose conversation usually answers itself; where they cannot, we say so rather than imply that a taper is a matter of resolve.

What people ask about the bloodwork

Do I need labs before my appointment?

Bring recent ones if you have them; we will order what is missing. What to expect.

Will you refuse to treat me if my A1C is high?

No. We are likely to recommend a sequence and to quote your odds honestly. How we assess candidacy.

I am not overweight. Is this relevant to me?

Often yes — a substantial share of metabolically unwell people are lean. The lean-athlete version of this.

Does this mean PRP will not work for me?

It means the odds shift, and that the terrain is worth treating alongside. What the injection is competing with.

Related reading

• Am I a candidate?
• How PRP works
• Not covered is not the same as unproven
• About Dr. Padda

The question people actually want answered

“Am I being told this is my fault?” No. And it is worth being direct about it, because most people arriving here have been carrying that implication for years.

Metabolic disease is the predictable output of a food supply engineered for shelf life and palatability, a built environment that removed incidental movement, work schedules that fragment sleep, and an isolation epidemic nobody codes for. Individual choices operate inside that, not instead of it.

What changes when you understand the physiology is not blame. It is leverage — you learn which of the inputs you can actually move, and which are being moved for you.

What we will not do with your bloodwork

• Use it as a reason to refuse treatment without discussing sequence.
• Hand you a supplement list. There is no dispensary here.
• Turn a consultation about a knee into a weight-loss appointment you did not ask for.
• Pretend a number on a panel tells us more about you than what you can and cannot do.

How this changes what an injection is worth

Two people present with the same ultrasound appearance in the same tendon. One has a fasting insulin in range and sleeps seven hours; the other has an A1C of 7.9 and works nights. The same preparation, placed identically by the same hands, is buying very different odds.

Nobody quotes it that way, because the literature reports an average across a population that mostly excluded the second person. So the number you are given is not wrong so much as not about you — and the correction is not a better number, it is a better assessment.

That is the whole argument for looking at bloodwork in a pain clinic. Not to widen the consultation for its own sake, and not to sell you something else. To tell you what your own odds are before you spend money on them.

Where the problem began with an injury rather than with time, the same reasoning runs on a much shorter clock — that version is on terrain first, then the catalyst.

The terrain is the ceiling on the result, and it is measurable.