How to Fix Osteoarthritis: Treatments That Work

Osteoarthritis cannot be reversed with any treatment currently available, but a surprisingly wide range of interventions genuinely reduce pain and improve how well the joint works. The most effective approach is not a single pill or procedure but a combination: losing weight if you carry extra, doing the right kinds of exercise, choosing medications strategically, and in some cases pursuing injections or surgery. The evidence behind each of these varies considerably, and some popular treatments turn out to be near-useless when tested rigorously. Here is what actually works, what sort of works, and what you can skip.

Why the Joint Keeps Getting Worse

Understanding even a little about what goes wrong in an osteoarthritic joint explains why the treatment list looks the way it does. Osteoarthritis is not just cartilage wearing thin. The bone underneath the cartilage remodels and stiffens, forming bony growths at the joint margins. Tiny fractures develop at the boundary between cartilage and bone, and synovial fluid seeps through those cracks, carrying inflammatory molecules that accelerate damage from the inside.

This means inflammation, structural bone changes, and cartilage loss all feed each other. That is why no single therapy can fix the entire problem. The treatments that work best tend to target either the mechanical load on the joint, the inflammatory response, or both.

Weight Loss Has an Outsized Payoff

If you are overweight and have knee osteoarthritis, losing weight is probably the single most impactful thing you can do. The math is striking: each pound of body weight you lose reduces the force on your knee by roughly four pounds with every step you take.² Multiply that across the thousands of steps in a normal day, and even modest weight loss translates into a meaningful reduction in cumulative joint stress.

The effect scales with the amount lost. In a study of people who lost an average of about 30 pounds, knee joint loading dropped by roughly 7%, and the twisting force that grinds the inner compartment of the knee fell by 12%.³ Greater weight loss also produced lower peak compressive forces at 18 months, driven mainly by reduced strain on the hamstring muscles.⁴ None of these studies suggest weight loss reverses damage that has already occurred, but lowering the mechanical beating the joint takes every day slows progression and reduces pain more reliably than most drugs.

Exercise Therapy Works, and the Type Matters

Exercise is consistently recommended in clinical guidelines, and the research backs that up, though the benefits are real but moderate. Across multiple systematic reviews, exercise reduces knee pain compared to doing nothing, with the strongest short-term evidence coming from structured programs rather than casual activity.⁵ Longer trials and larger trials tend to show smaller effects, which suggests that exercise helps more as a consistent habit than as a short burst.

Not all exercise does the same thing. A network meta-analysis that compared several types head to head found that cycling-based exercise and resistance training were among the best for pain reduction, while yoga came out on top for stiffness, daily function, and quality of life. Aerobic exercise scored highest on certain pain scales as well.⁶ The practical takeaway is that the best exercise is whatever you will do consistently. Resistance training to strengthen the muscles around the joint, combined with some form of aerobic conditioning, covers the most ground. Tai chi and yoga can be especially useful for people who also need balance work or who find conventional gym exercises uncomfortable.

A common worry is that exercise will damage an already degraded joint. The evidence does not support this fear for moderate activity. Strengthening the quadriceps and hip muscles takes load off the cartilage surfaces, and controlled movement helps maintain joint flexibility. The people who do worst with osteoarthritis are generally those who stop moving.

Medications for Pain and Inflammation

Anti-inflammatory drugs remain the most commonly used medications for osteoarthritis pain, and a key question is whether to take them as pills or rub them on the skin. The answer, for most people with knee osteoarthritis, leans toward topical. A meta-analysis of head-to-head trials found that topical and oral NSAIDs provided similar pain relief and similar improvements in stiffness.⁷ A broader review confirmed the same pattern: in direct comparisons, the two forms performed about equally well for both sudden and chronic pain. The difference showed up in side effects. Oral NSAIDs caused more stomach and gastrointestinal problems, while topical versions led to more local skin reactions like redness or itching.⁸

Since the gastrointestinal risks of oral NSAIDs accumulate over time and can be serious, especially in older adults, starting with a topical NSAID is a sensible first move for accessible joints like the knee. Deeper joints like the hip are harder to treat topically, and oral options may be needed sooner.

Acetaminophen Is Weaker Than Most People Think

Acetaminophen (paracetamol outside the US) is often the first drug people reach for, partly because it is available everywhere and considered very safe. But the evidence for its effectiveness in osteoarthritis is underwhelming. A Cochrane review pooling multiple trials found that acetaminophen was statistically better than placebo, but the actual improvement amounted to about a 5% reduction in pain, or roughly 4 points on a 0-to-100 scale.⁹ That is a real effect, but it is so small that many patients would not notice the difference.

A network meta-analysis comparing acetaminophen to NSAIDs found that topical NSAIDs were clearly superior to acetaminophen for knee function, and they actually carried a lower risk of gastrointestinal side effects than acetaminophen.¹⁰ That last finding surprises people, since acetaminophen has a reputation as the gentler option. It may still have a role for people who cannot tolerate NSAIDs at all, or as an add-on, but as a standalone treatment for osteoarthritis pain, it consistently underperforms.

Injections Into the Joint

When pills and creams are not enough, the next step is often an injection directly into the joint. There are several kinds, and their track records differ.

Hyaluronic Acid

Hyaluronic acid injections, sometimes called viscosupplementation, aim to restore some of the lubricating properties of healthy joint fluid. The evidence says they can help, but they are not a first-line option. A systematic review concluded that hyaluronic acid provides adequate pain relief and functional improvement, but the benefit typically lasts only up to six months regardless of the number of injections or the specific product used.¹¹ These injections are recommended mainly for people with mild to moderate knee osteoarthritis who have not gotten enough relief from medications and physical therapy. Serious side effects are rare, though temporary pain and swelling at the injection site are common. A European consensus group confirmed that hyaluronic acid injections can be used broadly across age groups and in patients with diabetes or moderate obesity, but recommended against them during an acute flare.¹²

Platelet-Rich Plasma

Platelet-rich plasma, or PRP, involves drawing your own blood, concentrating the platelets, and injecting them into the joint. It has generated a lot of buzz, but the evidence is mixed. One meta-analysis of randomized trials found that PRP patients reported substantially greater improvement in overall joint scores compared to hyaluronic acid patients, and about half of the pain-focused studies showed PRP to be significantly better.¹³ Another review noted that PRP seemed to provide longer-lasting pain relief and better function than hyaluronic acid.¹⁴

But a separate systematic review looking at four trials found that three of them showed no difference between PRP and hyaluronic acid, with only one concluding PRP was clearly superior.¹⁵ The inconsistency likely comes from differences in how PRP is prepared. There is no standard recipe: the number of spins, the platelet concentration, whether white blood cells are included, and the injection schedule all vary between clinics. Until preparation methods are standardized and tested, PRP remains promising but frustratingly inconsistent. It is also expensive and rarely covered by insurance.

Nerve Ablation for Persistent Pain

If you are not ready for joint replacement but other treatments have failed, radiofrequency ablation of the genicular nerves offers a middle-ground option. The procedure uses heat to interrupt the sensory nerves around the knee that transmit pain signals. It does not treat the joint itself but can substantially reduce what you feel. A prospective multicenter trial found that about two-thirds of patients still reported at least 50% pain reduction two years after the procedure, with large improvements in function and quality of life scores.¹⁶

The relief is temporary by nature, since the ablated nerves can regrow. In clinical practice, the effect typically lasts three to six months at minimum, and sometimes up to a year or longer.¹⁷ Cooled radiofrequency, a newer variant, seems to produce longer-lasting results. For people who respond well, the procedure can be repeated. It is worth considering as a bridge to joint replacement or as a standalone option for people who are poor surgical candidates.

Unloader Braces and Biomechanical Aids

When osteoarthritis is concentrated on one side of the knee, an unloader brace is designed to shift the load away from the damaged compartment. A randomized trial following patients for a year found that those wearing an unloader brace had significantly better knee scores and functional outcomes than the control group.¹⁸ Combining a brace with a lateral wedge insole showed the best biomechanical effect, particularly during activities like descending stairs.¹⁹

The biggest problem with braces is not whether they work but whether people actually wear them. Patients commonly stop using them because of discomfort, poor fit, skin irritation, or simply not noticing enough symptom relief.²⁰ If you go this route, getting a properly fitted brace and giving it a genuine trial of several weeks is worth doing before writing it off.

Glucosamine and Chondroitin Are Mostly Disappointing

Few supplements have been studied as thoroughly as glucosamine and chondroitin for osteoarthritis, and the results are not encouraging. The GAIT trial, one of the largest and best-designed studies, found that neither glucosamine nor chondroitin alone was significantly better than placebo at reducing knee pain overall.²¹ A subgroup of patients with moderate-to-severe pain did show a significant response to the combination of both supplements, but that finding was exploratory and has not been consistently replicated.

A network meta-analysis published in the BMJ reached a similar conclusion. The pain reductions seen with glucosamine, chondroitin, or their combination versus placebo were tiny and clinically irrelevant. The effect was even smaller in trials that were not funded by industry.²² The GAIT follow-up study looking at whether these supplements slowed structural damage found no significant difference in joint-space narrowing at two years for any treatment group.²³ These supplements are generally safe, so taking them is not harmful, but the odds that they will make a noticeable difference are low based on current evidence.

When Surgery Makes Sense

Arthroscopic surgery for osteoarthritis of the knee, where a surgeon goes in with a small camera to clean up debris and smooth rough cartilage, was once extremely popular. A landmark randomized trial changed that. Patients who received real arthroscopic surgery reported no less pain and no better function than those who received a sham procedure where skin incisions were made but nothing was actually done inside the joint.²⁴ This was one of the most influential studies in orthopedics, and guidelines now generally recommend against arthroscopic debridement for osteoarthritis alone.

Total knee replacement, by contrast, is a different story. When the joint is severely damaged and other treatments have failed, replacing the joint surfaces with metal and plastic components provides dramatic and lasting relief for most people. A recent analysis of a modern cohort found that close to 90% of patients reported satisfaction after total knee replacement.²⁵ Satisfaction remained consistent over long-term follow-up as well, suggesting the improvements are durable rather than fading over time.²⁶ Older age and higher body mass index were actually associated with greater satisfaction, possibly because these patients had worse starting symptoms and therefore more room for improvement. The remaining 10% or so who are dissatisfied is not trivial, and careful patient selection matters. But the idea that knee replacement is a coin flip is outdated.

Cognitive Behavioral Therapy and Pain Management

Osteoarthritis pain is not purely mechanical. How your brain processes pain signals, your sleep quality, and your emotional state all influence how much pain you experience. Cognitive behavioral therapy, typically delivered in a structured group or individual program, has been tested specifically for osteoarthritis. The results are nuanced. A meta-analysis of randomized trials found that CBT did not produce immediate improvements in pain, depression, or physical function compared to controls. But during the follow-up period, CBT did significantly reduce pain, insomnia, and depression.²⁷ The sleep benefits were particularly consistent, showing up both immediately after treatment and at follow-up.

This makes CBT a useful complement to physical treatments rather than a replacement for them. If your osteoarthritis pain is tangled up with poor sleep, anxiety about movement, or depression, addressing those factors can make the physical treatments work better. It is not about pain being “in your head.” It is about the nervous system amplifying a real signal when it is also dealing with sleep deprivation and emotional distress.

Emerging Therapies on the Horizon

Two categories of newer treatments have generated significant interest: disease-modifying drugs that aim to rebuild or preserve cartilage, and stem cell injections.

Sprifermin and Cartilage Regrowth

Sprifermin is an injectable growth factor that stimulates cartilage cells. In the FORWARD trial, the largest randomized test to date, sprifermin injected into the knee produced small but measurable increases in cartilage thickness over two years, while the placebo group lost cartilage over the same period.²⁸ The effect was dose-dependent and statistically clear. Earlier trials had shown similar trends, with reduced cartilage loss especially in the lateral compartment.²⁹ However, the structural improvements in the FORWARD trial were very small in absolute terms, and the trial was not designed to prove that thicker cartilage translates into less pain over the long term. Sprifermin remains in development and is not yet available outside of clinical trials, but it represents the closest anyone has come to a true disease-modifying drug for osteoarthritis.

Stem Cell Injections

Mesenchymal stem cell injections have been commercially marketed well ahead of the science. The evidence so far is cautiously encouraging but far from definitive. A meta-analysis of eight randomized trials involving about 500 patients found that stem cell injections significantly improved pain and function scores at both six and twelve months compared to controls. Stem cells derived from fat tissue and given at higher doses seemed to perform better.³⁰ An earlier meta-analysis found improvement in pain scores out to 24 months, but no significant improvement in several functional measures at 6 or 12 months.³¹ Safety appears acceptable, with no significant difference in adverse events between stem cell and control groups.

The challenge is that “stem cell therapy” as offered in clinics varies enormously. Some inject minimally processed bone marrow concentrate, others use cultured lab-expanded cells, and the regulatory status differs by country. The trials that show benefit use carefully controlled preparations that may not resemble what a storefront clinic is selling. If you are considering this route, look for clinics participating in registered clinical trials rather than those making sweeping marketing claims.

Anti-Nerve Growth Factor Drugs

Tanezumab, an antibody that blocks nerve growth factor, provides rapid and substantial pain relief in osteoarthritis. The concept is appealing: instead of numbing the nerve with ablation, you block the chemical signal that makes it fire. But the safety profile has been a persistent problem. In phase III trials, tanezumab significantly increased the risk of rapidly progressive osteoarthritis, a condition where the joint deteriorates unusually fast. That risk was dose-dependent, and combining tanezumab with NSAIDs made it worse.³² A detailed analysis of joint safety events found that about 3% of patients on tanezumab developed a confirmed joint complication, compared to none in the placebo group. The risk was highest in people who already had moderate to severe structural damage at baseline.³³ The FDA has not approved tanezumab, largely because of these concerns. Pain relief that comes at the cost of accelerating joint destruction is a hard trade-off, and this class of drug remains in regulatory limbo.

Why Arthroscopy for Osteoarthritis Failed

The story of arthroscopic surgery for osteoarthritis is worth understanding because it illustrates a broader principle in this field. For decades, surgeons went into arthritic knees to trim torn meniscal tissue, shave rough cartilage, and flush out inflammatory debris. It made intuitive sense: clean up the mess and the joint should feel better. The sham surgery trial showed that the improvement patients experienced came from the placebo effect of having a procedure, not from anything done inside the joint.²⁴

This is a useful cautionary template for evaluating newer treatments. Anything injected into a joint benefits from a strong placebo response. Patients expect improvement, the ritual of a medical procedure is powerful, and osteoarthritis symptoms naturally fluctuate, meaning people tend to seek treatment when pain is at its worst and then improve regardless of what was done. That does not mean all injections are placebo, but it does mean you should look for evidence from trials that included a sham or placebo injection arm, not just patient testimonials.

The Genetic Dimension

One reason osteoarthritis is so common may be baked into human evolution. Genome-wide association studies have identified more than 80 genetic risk loci for osteoarthritis, and about 95% of those risk variants sit in non-coding regions of DNA near genes involved in cartilage and bone development. Researchers have proposed that the same regulatory sequences that were optimized during the evolution of the modern human knee may now predispose us to osteoarthritis when genetic variation disrupts them in adulthood.³⁴ In other words, the architecture that gives humans their uniquely efficient walking posture may carry a built-in vulnerability. This does not change your treatment decisions today, but it helps explain why osteoarthritis affects hundreds of millions of people worldwide and why a cure has been so elusive. The condition is not just wear and tear from a hard life. It is woven into the biology of being human.