If you’ve been dealing with chronic tendon pain, recurring ankle sprains, arthritis, or a nagging injury that simply won’t heal, you’ve probably come across both PRP (Platelet-Rich Plasma) and prolotherapy.
Patients ask me about these treatments almost every week.
“Which one works better?”
“Is PRP worth the extra cost?”
“Should I try prolotherapy first?”
The answer is rarely as simple as saying one treatment is “better.”
In fact, both PRP and prolotherapy are regenerative injection therapies. Their goal isn’t simply to numb pain or reduce inflammation for a few weeks. They’re designed to stimulate your body’s own healing processes.
The real question is:
Which treatment makes the most sense for your particular injury?
That depends on what tissue is injured, how severe the damage is, how long it’s been present, and what you’re hoping to accomplish.
Why Some Injuries Never Fully Heal
Our bodies are remarkably good at healing cuts and broken bones. Tendons and ligaments are a different story. These tissues receive relatively little blood flow compared with muscle. That means healing often happens more slowly and sometimes never completely finishes.
Over time this can lead to:
- chronic tendon degeneration (tendinosis)
- ligament laxity
- recurring sprains
- joint instability
- persistent pain with activity
One mistake I commonly see is assuming that every painful tendon is inflamed. Many chronic injuries actually have very little active inflammation.
Instead, the collagen fibers become disorganized. Small areas of degeneration develop. Tiny partial tears may accumulate over months or years. This is why anti-inflammatory medications sometimes don’t solve the problem. They’re treating inflammation when the larger issue is tissue quality.
What Is Prolotherapy?
Prolotherapy has been around for decades. It typically involves injecting a concentrated dextrose (sugar) solution into injured ligaments, tendons, or joint-supporting structures. That surprises a lot of patients. “You’re injecting sugar?” Yes.
But not because sugar is somehow repairing tissue directly. The concentrated dextrose acts as a mild irritant that stimulates a localized healing response. This encourages fibroblasts, the cells responsible for producing collagen, to become more active. The goal is to encourage stronger, healthier connective tissue over time. In my clinic, I think of prolotherapy as helping restart a healing process that has stalled.
What Is PRP?
PRP stands for Platelet-Rich Plasma. Instead of using dextrose, PRP uses your own blood. A small blood sample is drawn and placed into a centrifuge. The centrifuge separates the blood into different layers, allowing the platelet-rich portion to be concentrated. Those platelets contain hundreds of biologically active proteins and growth factors involved in tissue repair.
Rather than simply creating a healing response, PRP also delivers many of the signaling molecules your body naturally uses during injury repair. This makes PRP a more biologically complex treatment.
How Do PRP and Prolotherapy Work Differently?
Although both treatments stimulate healing, they do it differently. Neither treatment is automatically better. They’re simply different tools.
| Prolotherapy | PRP |
|---|---|
| Uses concentrated dextrose | Uses your own platelets |
| Stimulates a healing response | Delivers concentrated growth factors and cytokines |
| Less invasive | Requires a blood draw and centrifuge |
| Lower cost | Higher cost |
| Often requires more treatments | Often requires fewer treatments |
| Excellent for mild to moderate connective tissue injuries | Often preferred for more advanced degeneration |
Which Conditions Respond Well to Prolotherapy?
Prolotherapy often works very well for conditions involving ligament laxity or early connective tissue degeneration.
Examples include:
- chronic ankle sprains
- SI joint instability
- mild golfer’s elbow
- mild tennis elbow
- plantar fasciosis
- chronic ligament injuries
- early knee arthritis
If someone comes into my clinic after repeatedly rolling an ankle while hiking or playing pickleball, prolotherapy is often one of the first regenerative treatments I consider. The ligament isn’t necessarily torn. It has simply become stretched out over time.
When Do I Lean Toward PRP?
One thing patients often ask me is, “If PRP is stronger, why not just do PRP for everyone?” There are two reasons. First, PRP is considerably more expensive. Second, not everyone needs that level of treatment. Where PRP really shines is when there is more significant tissue degeneration.
Examples include:
- chronic Achilles tendinosis
- partial rotator cuff tears
- moderate to severe knee arthritis
- chronic patellar tendinosis
- gluteal tendinopathy
- more advanced tennis elbow
Here’s how I usually think about it: If the tissue has simply stopped healing, prolotherapy may be enough to restart the process. If the tissue has undergone substantial degeneration or partial tearing, PRP often becomes the better option.
Does PRP Work Better for Arthritis?
Current research suggests that both prolotherapy and PRP can improve pain and function in knee osteoarthritis. However, studies generally show PRP produces greater improvements, particularly in people with moderate arthritis.
Why? Arthritis isn’t simply “wear and tear.”
The arthritic joint also contains inflammatory proteins, enzymes that break down cartilage, and changes in the joint environment. Because PRP delivers platelets and growth factors that participate in tissue signaling, it appears to influence that environment differently than dextrose alone. That doesn’t mean everyone with arthritis needs PRP. If someone has relatively mild arthritis, prolotherapy may provide excellent improvement while costing significantly less.
How I Decide Between PRP and Prolotherapy
What tissue is injured?
- Tendon?
- Ligament?
- Joint?
- Fascia?
How severe is the damage?
- Mild degeneration?
- Partial tearing?
- Significant chronic changes?
How long has it been present?
Three months is very different from three years.
Is the joint unstable?
Ligament laxity often responds beautifully to prolotherapy.
Has conservative care already failed?
If physical therapy, acupuncture, strengthening and activity modification haven’t produced enough improvement, regenerative injections become more attractive.
What makes financial sense?
This may sound unusual coming from a healthcare provider. But I think cost matters. If two prolotherapy treatments are likely to produce the same outcome as two PRP treatments, I don’t think it makes sense to recommend the more expensive option simply because it’s newer.
On the other hand, if I believe someone would need seven prolotherapy treatments to achieve what two PRP treatments are likely to accomplish, then PRP actually becomes the more economical choice. I try to recommend the treatment that provides the best value, not simply the highest price.
Why I Rarely Think in Terms of “The Best Injection”
Patients sometimes assume there must be one injection that works for everything. There isn’t. One mistake I commonly see is focusing on the injection before confirming the diagnosis. Sometimes the painful tendon isn’t actually the primary problem. It might be poor hip strength that is driving knee pain, or shoulder pain starting with scapular dysfunction. Sometimes a nerve is being compressed rather than the tendon being injured. The injection matters., but the diagnosis matters more.
| PRP | Prolotherapy | |
|---|---|---|
| Best for | Moderate to severe degeneration | Mild to moderate ligament/tendon injuries |
| Source | Your own platelets | Concentrated dextrose |
| Blood Draw | Yes | No |
| Cost | Higher | Lower |
| Typical Treatments | 1–3 | 2–4 |
| Downtime | Mild soreness | Mild soreness |
| Arthritis | Excellent evidence for knee OA | Good evidence, especially mild OA |
| Partial Tears | Often preferred | Sometimes appropriate |
FAQ
What is the difference between PRP and prolotherapy?
PRP uses platelets concentrated from your own blood to deliver growth factors into injured tissue. Prolotherapy uses a concentrated dextrose solution to stimulate the body’s healing response. Both are regenerative injection therapies, but they work through different mechanisms.
Is PRP better than prolotherapy?
Not always. PRP is often preferred for more advanced tendon degeneration, partial tears, and moderate to severe osteoarthritis. Prolotherapy can be an excellent option for ligament laxity, mild tendon injuries, and early arthritis.
Does prolotherapy hurt more than PRP?
Both procedures can cause temporary soreness. PRP requires a blood draw in addition to the injection, while prolotherapy uses a dextrose solution and does not require blood collection.
How many treatments will I need?
Many patients receive two to four prolotherapy treatments, while PRP often requires one to three treatments depending on the condition and its severity.
Can PRP and prolotherapy be used together?
Yes. In some cases, prolotherapy can be performed first, followed by PRP at a later visit. They are generally not mixed in the same syringe because concentrated dextrose can reduce platelet viability.
Is regenerative injection therapy covered by insurance?
Most PRP and prolotherapy treatments are considered elective and are not covered by insurance, although this varies depending on the plan and diagnosis.
Continue to Part 2
