Knee arthritis responds well to a combination of movement, weight management, and targeted pain relief, and most people can manage it effectively without surgery for years. The most common form, osteoarthritis, happens when the cartilage cushioning your knee bones wears down, eventually leading to bone rubbing on bone, stiffness, and pain. Here’s what actually works, starting with the approaches that have the strongest evidence behind them.
Exercise Is the Single Best Treatment
This sounds counterintuitive when your knee hurts, but exercise is the most consistently effective intervention for knee arthritis. The American College of Rheumatology strongly recommends it as a first-line treatment, and outcomes improve when sessions are supervised by a physical therapist rather than done entirely on your own.
Walking, strengthening exercises, water-based workouts, and neuromuscular training all work. No single type of exercise is better than the others, so the best choice is whichever one you’ll actually stick with. That said, quadriceps strengthening deserves special attention. Weak thigh muscles can’t absorb shock properly, which means your knee joint takes the hit. A structured program of leg extensions, leg presses, and lunges, done three times per week with gradually increasing resistance, has been shown to significantly reduce pain scores in clinical trials.
Tai chi also has strong enough evidence that it earns a top-tier recommendation from rheumatologists. It combines gentle movement with balance training and has been shown to reduce pain and improve function in people with knee osteoarthritis.
Why Losing Even a Little Weight Matters
Your knees absorb a force equal to several times your body weight with every step. Being just 10 pounds overweight increases the force on your knee by 30 to 60 pounds each time your foot hits the ground. That extra load accumulates across thousands of steps per day and accelerates cartilage breakdown.
The good news is that the math works in reverse too. Losing 5% or more of your body weight (about 10 pounds for a 200-pound person) produces measurable improvements in both pain and joint function. Weight loss is strongly recommended for anyone with knee arthritis who is overweight, and it’s one of the few interventions that can actually slow the disease’s progression rather than just managing symptoms.
Topical vs. Oral Pain Relievers
Anti-inflammatory medications are a cornerstone of knee arthritis treatment, but how you take them matters. Topical versions (creams or gels applied directly to the knee) work about as well as oral pills for improving knee function. The real difference is safety. Topical anti-inflammatories carry roughly half the risk of stomach and gastrointestinal problems compared to oral versions, and real-world data from large patient populations shows they’re also associated with lower risks of cardiovascular events.
Topical anti-inflammatories also outperform acetaminophen (Tylenol) for function, while carrying fewer gastrointestinal side effects. For knee arthritis specifically, where the joint sits close to the skin surface, topical options can deliver medication right where it’s needed. Many people start with a topical product and only add oral medication if they need more relief.
Injections: What to Expect
When creams and pills aren’t enough, steroid injections into the knee joint are a strongly recommended next step. They reduce inflammation directly at the source and can provide significant pain relief, though the effect is temporary.
Platelet-rich plasma (PRP) injections are a newer option with growing evidence. PRP uses a concentrated portion of your own blood to promote healing. Steroid injections often produce better results in the first four to six weeks, but PRP tends to outperform steroids by the three-to-six-month mark. Mayo Clinic data from over 1,100 patients shows a 60% to 70% chance of achieving at least 50% improvement in pain and function, with relief lasting six to 12 months. PRP also appears to outperform hyaluronic acid (gel) injections in most studies, with longer-lasting benefits. Side effects are minimal: mild soreness and some swelling after the injection.
The tradeoff is that PRP is slower to kick in and is often not covered by insurance.
Braces and Walking Aids
If arthritis is affecting one side of your knee more than the other (which is common), an unloader brace can shift weight away from the damaged area. Studies show these braces improve pain, daily function, and walking distance after several weeks of consistent use. They work either by redistributing load off the damaged compartment or by stabilizing the knee so surrounding muscles don’t have to work as hard.
A cane is also strongly recommended when knee arthritis significantly affects your ability to walk or causes instability. Use it on the opposite side of the affected knee. Both braces and canes take some getting used to, but they can meaningfully extend your ability to stay active without surgery.
Glucosamine and Chondroitin
These are the most popular supplements for joint health, but the evidence is genuinely mixed. A combined analysis of 29 studies with over 6,000 participants found that glucosamine and chondroitin each reduced pain when taken separately, but oddly, the combination of both together did not show a significant benefit. Individual study results varied widely.
The major medical organizations don’t agree on what to recommend. The American College of Rheumatology strongly recommends against using either supplement, citing a lack of convincing evidence. The Osteoarthritis Research Society International takes the same position. However, the American Academy of Orthopaedic Surgeons lists both as potentially helpful for mild-to-moderate knee arthritis while acknowledging the inconsistent evidence. If you want to try them, they’re generally safe, but set realistic expectations and give them two to three months before deciding whether they’re helping.
Self-Management Programs
Learning how to pace your activities, protect your joints during daily tasks, and manage flare-ups makes a real difference in long-term outcomes. Self-efficacy and self-management programs are strongly recommended by rheumatology guidelines. These programs, often offered through hospitals, arthritis foundations, or community centers, teach you how to stay active without overdoing it, handle pain episodes, and maintain confidence in your ability to manage the condition. People who feel in control of their arthritis consistently report less pain and better function than those who don’t, even when the underlying joint damage is similar.
When Surgery Becomes the Right Call
Total knee replacement is a last resort, not a first option. You’re typically a candidate when nonsurgical treatments, including medications, physical therapy, injections, and assistive devices, have all failed to provide adequate relief. Specific signs that point toward surgery include chronic knee swelling that doesn’t respond to rest or medication, visible deformity such as the knee bowing inward or outward, and pain that consistently limits your daily life.
Importantly, surgical decisions are based on your pain and functional limitations, not your age. There’s no age cutoff that automatically qualifies or disqualifies you. The goal is to exhaust less invasive options first and move to surgery only when your quality of life demands it.