From Mild Wear to Bone-on-Bone: The 4 Stages of Knee Osteoarthritis and Natural Treatment Options with Red Light Therapy & PRP

 

The 4 Stages of Knee Osteoarthritis and Natural Treatment Options with Red Light Therapy & PRP

You or someone you know is dealing with knee osteoarthritis — let us help!

Knee osteoarthritis (OA) is one of the most common joint conditions worldwide, affecting millions of adults and often progressing silently until pain and stiffness disrupt daily life. Whether you're in the early stages with occasional discomfort or facing advanced bone-on-bone changes, understanding the disease progression is the first step toward smarter, more natural relief.

At Red Light Therapy Spa LLC, we specialize in non-invasive, drug-free approaches that support your body's own healing processes. Two of our most effective tools—Red Light Therapy (also called photobiomodulation or PBM) and Platelet-Rich Plasma (PRP)—can be used at different stages to reduce pain, lower inflammation, and help you stay active longer.

Below, we break down the four stages of knee osteoarthritis with a clear visual, explain how each therapy works, and share when (and why) we recommend switching from or combining RLT and PRP.

The 4 Stages of Knee Osteoarthritis: What’s Happening Inside Your Joint

Knee OA is a progressive condition driven by the gradual breakdown of cartilage, the protective cushion between bones. Here’s how it typically unfolds:

• Stage 1 (Mild): Minor cartilage wear with very little or no pain. The joint space is mostly normal, but early changes are visible on X-rays. Many people don’t even realize it’s happening yet.
• Stage 2 (Moderate): Joint space begins to narrow and small bone spurs (osteophytes) form. Stiffness after sitting or in the morning becomes noticeable, along with occasional pain during activity.
• Stage 3 (Severe): Significant cartilage loss leads to more bone-on-bone friction. Inflammation ramps up, causing swelling, constant pain, and reduced range of motion. Daily tasks like stairs or walking become challenging.
• Stage 4 (End-Stage): Almost complete cartilage loss results in bone rubbing directly on bone. Pain is often severe and constant, with major limitations in mobility and quality of life. This is when many consider joint replacement.

The good news? You don’t have to wait until Stage 4 to act. Early intervention with natural therapies can slow progression, manage symptoms, and help you avoid or delay surgery.

Red Light Therapy (Photobiomodulation): A Gentle Starting Point for All Stages

Red light therapy uses specific wavelengths of low-level red and near-infrared light to penetrate the skin and reach damaged joint tissues. It doesn’t heat the tissue like a heating pad—instead, it stimulates the mitochondria (the “powerhouses” of your cells) to produce more ATP (cellular energy). This triggers a cascade of beneficial effects:

• Reduces inflammation by lowering pro-inflammatory markers (such as IL-1β and IL-6)
• Eases pain and stiffness
• Improves blood flow and cellular repair
• Supports cartilage health and joint function

What the research shows Recent systematic reviews and meta-analyses (2023–2025) confirm that PBM significantly reduces knee OA pain and improves physical function, especially when used as an adjunct to exercise. One 2025 randomized controlled trial found notable improvements in pain (VAS scores), stiffness, and daily function after consistent sessions using 790 nm wavelength parameters. Another 2026 review highlighted PBM’s ability to modulate synovial inflammation and support cartilage metabolism without any significant side effects.

Because it’s painless, non-invasive, and has an excellent safety profile (no downtime, minimal risk), RLT is ideal as a first-line or ongoing supportive therapy across all stages. Many clients in Stages 1–3 report noticeable relief in pain and mobility after just a few weekly sessions. In later stages, it can still provide comfort and help with post-activity recovery.

PRP Therapy: Targeted Healing for Moderate to Severe Cases

Platelet-Rich Plasma (PRP) takes a different, more regenerative approach. We draw a small sample of your own blood, concentrate the platelets (which are packed with growth factors), and inject the PRP directly into the knee joint.

These growth factors:

• Reduce inflammation
• Stimulate tissue repair
• Promote new blood vessel formation
• May help protect remaining cartilage

What the research shows Multiple meta-analyses show PRP provides clinically meaningful pain relief and functional improvement lasting 6–12 months in mild-to-moderate knee OA—often outperforming hyaluronic acid injections. A 2025 review of thousands of knees found superior outcomes versus placebo or other injectables, especially when using leukocyte-poor PRP with adequate platelet dosing (at least 5–10 billion platelets per injection). Results are best in Stages 2–3, where some cartilage remains to respond to the healing signals.

PRP is considered very safe because it uses your own blood, with minimal risk of allergic reaction or infection.

When Should You Switch from Red Light Therapy to PRP—or Combine Them?

Here’s our practical, stage-based guidance based on current evidence and real-world client outcomes:

• Stages 1–2 (Mild to Moderate): Start with consistent Red Light Therapy (typically 2–3 sessions per week for 4–8 weeks, then maintenance). It’s the gentlest entry point and works beautifully to control early inflammation and keep you moving. Add PRP if symptoms persist despite RLT + exercise/lifestyle changes.
• Stage 3 (Severe): Many clients benefit from combining both therapies. Use RLT for ongoing pain and inflammation management between PRP injections. PRP can provide longer-lasting regenerative support when cartilage loss is more advanced but still present.
• Stage 4 (End-Stage): RLT remains a safe, daily comfort option for pain and swelling. PRP may offer limited benefit here because there’s little cartilage left to regenerate, but some patients still experience temporary relief. At this point we focus on quality-of-life support while discussing surgical options with your orthopedic team.

Bottom line: We almost always recommend beginning with Red Light Therapy because it’s accessible, affordable, and has zero downtime. PRP is a logical next step (or complementary tool) when you need deeper regenerative support—especially in Stages 2–3.

Why These Natural Approaches Align with Our Mission

At Red Light Therapy Spa LLC, we believe everyone deserves to heal fully and naturally—emerging not just recovered, but stronger, more energized, and confident—without relying on overprescribed drugs or unnecessary surgeries.

Both RLT and PRP fit this philosophy perfectly:

• Non-invasive or minimally invasive
• Use your body’s own biology (light energy or your own platelets)
• Excellent safety records with minimal side effects
• Can be repeated safely and combined with exercise, weight management, and physical therapy

Ready to Take Control of Your Knee Health?

If you or someone you love is living with knee osteoarthritis (or OA anywhere else in the body), we invite you to book a no-obligation consultation. We’ll review your stage, symptoms, and goals, then create a personalized plan using Red Light Therapy, PRP, or a smart combination of both.

📍 Red Light Therapy Spa LLC 1295 S Linden Rd., Ste. F Flint, MI 48532

📞 (810) 420-8827 | https://redlighttherapyspallc.com/

🌐 Schedule Your Consultation

Spring is the perfect time to invest in your mobility before summer activities ramp up. Mention this article when you call or book online, and we’ll include a complimentary joint assessment.

You don’t have to live with the pain and limitations of knee osteoarthritis. Natural, science-backed options are available right here in Flint, Michigan—and we’re here to help you feel stronger every step of the way.

To your health, mobility, and vitality, Tracy G.J. Congdon & Team Red Light Therapy Spa LLC