There is no single best treatment for knee osteoarthritis. The most effective approach combines several strategies, and what works best depends on the severity of your arthritis, your weight, your activity level, and how much pain you’re dealing with. That said, clinical guidelines consistently point to the same core treatments: exercise, weight management if needed, topical anti-inflammatory medications, and physical therapy. These form the foundation, with injections, braces, and surgery playing supporting or later-stage roles.
Exercise Has the Strongest Evidence
If there’s one treatment that comes closest to “best,” it’s regular exercise. That might sound counterintuitive when your knees hurt, but the research is overwhelming. Aerobic exercise (walking, cycling, swimming) produces large improvements in pain at both short-term and mid-term follow-up. Across all types of exercise studied for knee osteoarthritis, aerobic exercise consistently ranks as the most likely to improve pain, function, and quality of life.
Strengthening exercises matter too, particularly for the muscles around the knee. Building lower limb muscle mass improves joint stability and takes pressure off damaged cartilage. A good program targets the quadriceps, hamstrings, and hip muscles, all of which help control how force travels through the knee. Range-of-motion work keeps the joint from stiffening up. Most people benefit from a mix of all three: aerobic activity, resistance training, and flexibility exercises.
The key is consistency. A physical therapist can design a program tailored to your pain level and gradually increase the challenge. Many people notice improvement within six to eight weeks of regular exercise.
Topical NSAIDs Before Oral Ones
For medication, clinical guidelines from the American College of Rheumatology strongly recommend starting with topical anti-inflammatory creams or gels (like diclofenac gel) before moving to oral versions like ibuprofen or naproxen. The reason is simple: topical NSAIDs work just as well for knee function but are significantly safer. A large network meta-analysis found that topical NSAIDs had less than half the risk of gastrointestinal side effects compared to oral NSAIDs. They also performed better than acetaminophen for both pain relief and safety.
Because the knee is a relatively shallow joint close to the skin’s surface, topical medications can penetrate effectively. You apply the gel directly over the knee two to four times daily. The most common side effect is mild skin irritation at the application site, which is a far better trade-off than the stomach problems, kidney strain, or cardiovascular risks that come with long-term oral NSAID use.
When topical treatment isn’t enough, oral NSAIDs are the next step, but guidelines emphasize using the lowest effective dose for the shortest time possible. Capsaicin cream (derived from chili peppers) is another topical option that some people find helpful, though it can cause a burning sensation initially.
Weight Loss Makes a Measurable Difference
Every pound of body weight translates to roughly three to four pounds of force on your knees with each step. For people who are overweight or obese, losing weight is one of the most powerful interventions available. Research from Wake Forest University found that losing 10% of body weight meaningfully improves osteoarthritis symptoms. Losing 20% produces even better results, with significantly greater pain relief, improved function, and reduced inflammation markers. That 20% target was achievable through diet and exercise alone, without surgery or medication.
For someone who weighs 200 pounds, that means losing 20 to 40 pounds. It’s not easy, but the effect on knee pain can be dramatic because you’re reducing the mechanical load on the joint during every activity throughout the day, not just during exercise.
Injections for Moderate to Severe Pain
When oral and topical medications aren’t providing enough relief, injections directly into the knee joint are a common next step.
Corticosteroid injections are the most well-established option and are strongly recommended by the ACR. They reduce inflammation quickly, often providing noticeable relief within days. The duration varies widely: some people get months of benefit, while others find the effect wears off in a few weeks. They’re typically limited to three or four injections per year because repeated use may accelerate cartilage breakdown over time.
Hyaluronic acid injections (viscosupplementation) aim to restore some of the lubricating fluid that breaks down in arthritic joints. Pain relief tends to take longer to kick in compared to corticosteroids, but it can last months or longer in people who respond well. The evidence is mixed enough that the American Academy of Orthopaedic Surgeons recommends against their routine use, though many individual patients report meaningful benefit.
Platelet-rich plasma (PRP) injections are a newer option. A Mayo Clinic meta-analysis found that PRP generally outperformed both saline placebo and hyaluronic acid injections, with benefits lasting six to 12 months in many patients. PRP is not yet covered by most insurance plans, and the quality of PRP preparations varies between clinics, which makes the evidence harder to interpret.
Nerve Ablation for Non-Surgical Candidates
For people with significant pain who aren’t good candidates for knee replacement, or who want to delay surgery, genicular nerve ablation is a procedure worth knowing about. It uses heat to disrupt the small nerves that carry pain signals from the knee joint to the brain. A randomized controlled trial found that the procedure reduced chronic knee pain by roughly 40 points on a 100-point scale, and that relief lasted at least 52 weeks with the cooled radiofrequency technique. Most patients in the study rated the treatment effect as good or very good. The procedure doesn’t change the underlying arthritis but can provide meaningful pain relief while preserving the option for surgery later.
Braces and Assistive Devices
If your arthritis is primarily on one side of the knee (most commonly the inner, or medial, compartment), an unloader brace can help. These braces apply a gentle corrective force that shifts pressure away from the damaged side, reducing pain during walking and standing. They’re not a cure, but they can make daily activities more comfortable and allow you to exercise with less pain. Simpler supports like knee sleeves, walking poles, or cushioned shoe insoles can also reduce joint stress.
Glucosamine and Chondroitin: Limited Evidence
Glucosamine and chondroitin are among the most commonly purchased supplements for joint health, but the evidence for knee osteoarthritis is disappointing. A systematic review and meta-analysis found that adding glucosamine (alone or combined with chondroitin) to an exercise program produced no significant improvement in knee pain or physical function compared to exercise alone. The typical doses studied were 1,500 mg of glucosamine and 1,200 mg of chondroitin daily. Some people report subjective improvement, and the supplements are generally safe, but they shouldn’t replace proven treatments like exercise and weight management.
When Knee Replacement Makes Sense
Total knee replacement is reserved for osteoarthritis that hasn’t responded adequately to non-surgical treatments. It’s a major surgery, but a highly successful one. In a modern cohort study published in The Journal of Arthroplasty, nearly 90% of patients reported satisfaction following the procedure. Pain scores, function, and quality of life all improved significantly from before surgery to one year afterward.
Modern implants are durable, though exactly how long they last depends on factors like your activity level, weight, and age at surgery. Recovery typically involves several weeks of reduced mobility followed by months of physical therapy. Most people return to low-impact activities like walking, cycling, and swimming within three to six months. The surgery tends to work best for people who have bone-on-bone arthritis visible on X-rays and whose daily life is significantly limited despite trying other treatments.
Putting a Treatment Plan Together
The most effective approach for most people layers several treatments together rather than relying on any single one. A practical starting point looks like this: begin a regular exercise routine (even 30 minutes of walking several times a week), use topical anti-inflammatory gel on painful days, and work on weight loss if you’re carrying extra pounds. Add physical therapy if you need guidance on strengthening exercises or are nervous about exercising with a painful knee. If those steps aren’t enough, injections and braces can provide additional relief. Surgery is the final option when the joint is severely damaged and conservative measures have been exhausted.
The progression from lifestyle changes to medications to injections to surgery isn’t strictly linear. Some people do well for years with exercise and occasional topical NSAIDs. Others need a combination of injections and bracing to stay active. The goal at every stage is the same: reduce pain enough to keep moving, because staying active is what protects the joint long-term.