Why a pain clinic asks to see your bloodwork

CANDIDACY / METABOLIC HEALTH

We check metabolic health bloodwork before PRP because tendon and joint healing is an anabolic (building) process. It runs on your metabolic budget. Insulin resistance, glycation and metainflammation decide what platelet-rich plasma has to work with. That is why a knee appointment includes your A1C.

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

Why does metabolic health matter for healing?

A tendon or a joint does not heal by being left alone. It heals by building. It lays down collagen, grows new vessels and reshapes the result under load. That is construction work, and construction work runs on the materials at hand.

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

How does diabetes affect tendon and joint healing?

• Insulin resistance and hyperinsulinemia. A long-term high insulin signal pushes tissue toward storage and inflammation instead of repair. It also slows delivery through the tiny vessels to entheses (where tendon meets bone). Those were already the structures with the worst blood supply in the limb.
• Glycation. Advanced glycation end-products (sugar-damaged proteins) cross-link collagen the wrong way. The tissue that forms is stiffer. It fails at lower strain than what it replaced. That is why a diabetic tendon behaves differently under load, even when it looks intact.
• Metainflammation. Visceral fat (fat packed around the organs) is endocrine tissue. It releases signaling molecules that keep cartilage and tendon breaking down, no matter how carefully you exercise.

What blood tests do you check before PRP?

• 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 (low thyroid) on its own alters tendon quality
• Inflammatory markers when an inflammatory arthropathy (joint disease) is one of the possible causes
• Sleep, asked about properly, because most repair signaling happens at night

What do you do if my bloodwork is abnormal?

Not refuse you. Sequence you. Say your A1C is 8.4 and you have three tendinopathies at once. The useful talk is not which one to inject first. It is that you do not have three injuries. You have one body-wide process showing up three ways. Treating the terrain changes the odds on all of them.

Sometimes the order is metabolic work first and injection later. Sometimes it is both together, because the pain is blocking the movement the metabolic work needs. That call is 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 handles its own number well. No one owns the collision. The patient is left piecing a picture together from four partial views.

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

The part that is not a lecture

None of this is advice about willpower. The food environment is engineered. Acellular carbohydrates and industrial seed oils are the cheapest calories around because policy made them cheap. They are packed into the places where other choices are fewest. Shift work disrupts blood sugar control by design. Isolation raises inflammatory tone through ways as measurable as any drug.

You did not choose most of the inputs. You can change some of them. 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 finding out which structure hurts.
• Fix what is cheap and fast. Time for sleep, enough protein, nicotine, and the loading pattern that keeps re-injuring the tissue.
• Treat the tissue where the window matters. If pain is blocking the movement the metabolic work needs, the injection comes earlier, not later.
• Keep loading. For good, at a lower dose. Tendon capacity is use it or lose it. So is insulin sensitivity.

How does better blood sugar help PRP work?

Two things, and they build on each other. Collagen laid down under better blood sugar control is better collagen. It is less glycated, better cross-linked and tougher under strain. And the body-wide inflammatory signal that kept tissue breaking down falls. So the repair you trigger 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 medicine question. A nervous system asked to quiet down needs three things. It needs sleep that works. It needs an inflammatory load that is falling, not rising. It needs enough function back to move. Those are the same three things this page is about. Where they improve, the dose question usually answers itself. Where they cannot, we say so. We do not imply that a taper is a matter of willpower.

At our physiotherapy visits, your bloodwork turns into a daily plan through diet and metabolic health coaching.

Frequently asked questions about bloodwork and PRP

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 an order and to quote your odds honestly. How we assess candidacy.

I am not overweight. Is this relevant to me?

Often yes. A large 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 at the same time. What the injection is competing with.

Should I fix my metabolic health before PRP or at the same time?

It depends on what is driving your case. Sometimes metabolic work comes first and the injection later. Sometimes both happen together, because pain is stopping the movement the metabolic work needs. Then the injection comes earlier. Either way, the diagnosis gets worked out first. The cheap and fast fixes come next. Loading goes on for good at a lower dose.

Will you sell me supplements or put me on a diet?

No. There is no dispensary here, so there is no supplement list to hand you. A visit about your knee will not turn into a weight-loss appointment you did not ask for. We use the bloodwork to plan the order of treatment and to tell you your odds honestly. We never use it as a reason to refuse treatment without discussing the order.

Does sleep affect healing after PRP?

Yes. Most repair signaling happens overnight. That is why we ask about sleep properly, not in passing. A nervous system being asked to quiet down also needs sleep that works. Time for sleep is one of the cheap, fast fixes we address early. So are protein, nicotine and the loading pattern that keeps re-injuring the tissue.

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. It is worth being direct about it, because most people arriving here have carried that hint for years.

Metabolic disease is the predictable output of the world around us. A food supply engineered for shelf life and taste. Towns built so that everyday movement disappeared. Work schedules that break up sleep. An isolation epidemic nobody codes for. Your choices operate inside that, not instead of it.

Understanding the physiology is not about blame. It is about leverage. You learn which inputs you can actually move, and which are being moved for you.

How we use your bloodwork

• To set the order of treatment with you, never as a reason to refuse it.
• To guide care, not to sell you supplements. There is no dispensary here.
• In service of the knee you came about, not a weight-loss appointment you did not ask for.
• Alongside what you can and cannot do, which tells us more about you than any number on a panel.

How this changes what an injection is worth

Two people show the same ultrasound picture 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 the same way by the same hands, is buying very different odds.

Nobody quotes it that way, because the research reports an average across a group that mostly left out the second person. So the number you are given is not wrong so much as not about you. The fix is not a better number. It is a better assessment.

That is the whole case for looking at bloodwork in a pain clinic. Not to widen the visit for its own sake. Not to sell you something else. To tell you your own odds before you spend money on them.

When the problem began with an injury instead of 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.