Too soon, too late, or now: deciding when an injury is ready

TIMING

An injury is ready for a biologic injection when its repair has stalled, not on a set date. A fresh injury is the wrong moment. That is because the tissue is already running the signal a catalyst gives. The graded evidence covers lasting problems that did not clear up with conservative care.

People arrive at two extremes. One wants an injection this week. The injury is fresh, and doing something feels better than waiting. The other has waited three years and assumes the door has closed. Both are asking a real question, and neither answer is a date.

Why the fresh injury is the wrong moment, biologically

In the first days after an injury, the tissue is already doing what a catalyst is meant to trigger. The hematoma (the pool of blood) at the site is a platelet delivery. Growth factors are being released at the top of their range. Neutrophils are clearing damaged material. Macrophages are lined up behind them. The cascade is running at full volume.

Inject a concentrate of that same signal into that setting, and you have not raised the volume of anything. There is nothing stalled to restart. A catalyst is a tool for a process that has stopped. In week one, nothing has stopped. The phases and what each one responds to are set out on the tissue timeline page.

The mirror error is just as common. A repair that stalled two years ago is a very different biological state from a fresh tear. Treat the two as one question, and people decide this whole category either always works or never does.

Where the graded evidence actually lives: persistent, not fresh

Look at who the guideline documents recruited. Every ESSKA-ICRS scenario rated appropriate describes a patient who had already been through conservative care. The 2025 ASIPP guideline puts regenerative therapy after a diagnostic work-up. It places it beside rehab, not ahead of either. All sixteen questions in the multispecialty guidelines concern chronic pain. From end to end, the graded record here is about problems that did not go away.

Timing is one variable. The target is the other.

A well-timed injection into the wrong structure is still a wasted injection. Afterward, it will look like a treatment that did not work. Before anything is scheduled, the pain generator has to be named. That is done by mechanism and exam. Where it stays unclear, a diagnostic block tests the leading candidate directly. Another image of the same region does not.

This is where a lot of letdown starts, and it is almost never recorded as the cause. Two failure modes look the same from the outside. One is a target that was never confirmed. The other is a preparation nobody measured. The second is on the preparation page, the first on the page about normal scans.

Anti-inflammatories in the first two weeks, honestly

One confident claim online says anti-inflammatory medicine blocks healing and must be avoided. The clinical evidence is weaker than that confidence. A systematic review pooled four studies with 4,451 patients. 93% of them had anterior cruciate ligament reconstructions. It found no significant effect of perioperative (around the time of surgery) anti-inflammatories on reoperation. That held after meniscal repair, cruciate reconstruction and Bankart repair. It did find one difference. After rotator cuff repair, the retear rate was higher with celecoxib than with ibuprofen, 37% against 7%. The authors' own conclusion is that the available data are insufficient to state the effect definitively.

So we hold a case-by-case position, not a slogan. Around a specific tendon-to-bone repair, there is a signal worth respecting. But a rule that everyone must avoid every anti-inflammatory after every injury is not supported. Pain that goes untreated has costs of its own. Where medicine fits in a plan is on the stewardship page.

Ready is a state, not a date

Time is one side of readiness. The other is whether the body can carry out the order when it arrives. The injection is autologous. It is made from you on the morning of the procedure. The tissue receiving it repairs on your metabolic budget. A catalyst delivered into an inflamed terrain is spent, not stored. That is why the first visit leads to lab work, not a booking. It is also why the three months between the first visit and a likely procedure are working months, not waiting months. What we measure is on the metabolic health page.

What follows is hard to hear, and worth saying anyway. Say a modifiable (changeable) condition is holding back the result. Say it has not been addressed. Then an injection given on schedule follows the guideline and still comes with a letdown you can predict. We say that in month one rather than explain it in month seven.

The window we work in

For a soft-tissue injury, the useful conversation usually starts around the three-month mark. By then it is clear whether the repair is finishing or has stalled. It starts earlier if the path is plainly wrong. The evaluation itself should come even earlier, as soon as you can get here. For a joint surface injured in an event, the question is not measured in months at all. It is a question of direction, set out on the post-traumatic knee page.

There is no upper bound. Chronic is the state the evidence supports treating.

The timing questions we get most

I was hurt last week. Can I have PRP now?

Almost certainly not, and it is not a scheduling problem. In week one the site is already soaked with platelets, and the cascade is already at full volume. So there is nothing stalled for a catalyst to restart. Be evaluated now and treated on the tissue's schedule, which is laid out on the tissue timeline page.

It has been four years. Have I missed the window?

No. Lasting problems are what the graded evidence was built on. So a long history is a reason to be assessed, not a reason not to be. What changes with time is the target, not whether you qualify. See whether you are a candidate.

Should I stop taking ibuprofen?

Not on a blanket rule. The clinical review of perioperative anti-inflammatories found no significant effect on most soft-tissue repairs. It found one specific signal around rotator cuff repair. Its own conclusion is that the data are insufficient to be definitive. We decide it case by case. It goes with the rest of the medicine plan on the stewardship page.

Does waiting make the arthritis worse?

Waiting does not help the joint. The reason is that temporary tissue firms up in whatever shape it is left in. That is a different question from whether an injection prevents arthritis, which nothing has shown. The path after a joint injury is covered on the post-traumatic knee page.

Why do some clinics inject people the week of the accident?

Because in the first two weeks almost everything improves anyway. That makes an injection easy to sell and hard to argue with. We keep the order the guideline documents themselves set. What that means for a first appointment is on the what-to-expect page.

Read alongside this

• The tissue clock after an injury
• The ankle sprain that never came right
• Am I a candidate?
• Why the trials disagree
• How PRP works
• Injury and work comp