Bone spurs in the knee are treatable through a range of approaches, from targeted exercise and weight management to injections and, in severe cases, surgery. Most people manage symptoms successfully without an operation. The right treatment depends on how much pain and stiffness you’re experiencing and how far the underlying joint damage has progressed.
Bone spurs (osteophytes) form when damaged cartilage releases chemical signals that trigger new bone growth at the edges of the joint. The process starts in the tissue lining the joint, where cells form a cartilage-like structure that gradually hardens into bone. This means bone spurs are a symptom of joint deterioration, not the root problem. Treating them effectively requires addressing the cartilage loss and inflammation driving their growth.
Why Bone Spurs Form in the Knee
Cartilage breakdown is the engine behind bone spur formation. When cartilage deteriorates, it releases inflammatory proteins that signal surrounding tissue to start building new cartilage-like material at the joint margins. That material then calcifies into bone. Importantly, this process isn’t caused by mechanical pressure or direct physical stress on the joint. It’s mediated by cells in the synovial lining, the membrane that produces the fluid keeping your knee lubricated. So even areas of the knee that aren’t bearing heavy loads can develop spurs if the inflammatory signaling reaches them through the joint fluid.
This is why bone spurs and osteoarthritis go hand in hand. The spurs themselves can cause pain by pressing on nearby soft tissue, limiting range of motion, or catching during movement. But the stiffness, swelling, and deep ache most people feel comes primarily from the cartilage loss and joint inflammation underneath.
Exercise and Physical Therapy
Strengthening the muscles around your knee is one of the most effective ways to reduce bone spur symptoms. Stronger muscles absorb more of the force that would otherwise travel through the joint, which slows further cartilage loss and reduces pain. The American Academy of Orthopaedic Surgeons recommends targeting five muscle groups: the quadriceps (front of the thigh), hamstrings (back of the thigh), outer and inner thigh muscles, and the glutes.
Strengthening exercises like half squats, hamstring curls, leg extensions, straight-leg raises, and leg presses work best at four to five days per week. Stretching the same muscle groups should also happen four to five days per week, while calf stretches and raises can be done daily. Two to three sessions per week is the minimum needed to maintain the strength and flexibility gains you build up over time.
Low-impact activities like swimming, cycling, and water aerobics let you build strength and cardiovascular fitness without pounding the joint. If a bone spur is causing catching or locking sensations, a physical therapist can help you modify movements to work around the mechanical limitation while still strengthening the surrounding muscles.
Weight Management
Losing weight produces an outsized benefit for knee pain because of how forces multiply across the joint. When you walk on flat ground, your knees absorb roughly one and a half times your body weight with every step. A person weighing 200 pounds puts about 300 pounds of force through their knees each stride. That multiplier means even modest weight loss translates to a significant reduction in joint stress. Losing 10 pounds, for instance, removes about 15 pounds of pressure per step, and those steps add up to thousands per day.
Beyond the mechanical benefit, fat tissue produces inflammatory compounds that accelerate cartilage breakdown. Reducing body fat lowers the concentration of those signals circulating through the joint fluid, which may slow the very process that triggers new bone spur growth.
Injections for Pain Relief
When exercise and lifestyle changes aren’t enough, joint injections offer the next tier of relief. The two most common options are corticosteroid injections and hyaluronic acid (viscosupplementation), and they serve different purposes.
Corticosteroid injections deliver fast, potent anti-inflammatory relief. They work well for flare-ups, typically providing noticeable improvement within days. The trade-off is that the relief is short-lived, and guidelines recommend waiting at least 12 weeks between injections to avoid weakening the joint tissues over time. At three months, corticosteroids rank poorly against other options for sustained benefit.
Hyaluronic acid injections take a different approach. The gel-like substance supplements your knee’s natural lubricating fluid, reducing friction and cushioning the joint. The treatment involves one injection per week over three to six weeks, with at least six months between series. It takes longer to feel results, but the payoff is more durable. Comparative data consistently show hyaluronic acid outperforms corticosteroids for pain relief at six and 12 months.
Platelet-Rich Plasma (PRP)
PRP therapy, which uses a concentrated preparation of your own blood platelets injected into the knee, has gained substantial clinical support. A 2025 meta-analysis of 18 randomized controlled trials covering nearly 2,000 patients found that PRP significantly improves pain and function compared to placebo at both 6 and 12 months, with benefits exceeding the threshold considered clinically meaningful. A separate review of 35 trials with over 3,300 patients found PRP consistently outperformed corticosteroids in mid-term and long-term results.
The European Society of Sports Traumatology, Knee Surgery and Arthroscopy gave PRP a grade A recommendation for knee osteoarthritis in 2024, its highest level of support. One important nuance: dose matters. Studies show a clear dose-response relationship, with preparations containing more than 10 billion platelets per injection producing significantly better outcomes than lower-dose protocols. If you’re considering PRP, the concentration used by your provider is worth asking about.
Other Non-Surgical Options
Several additional treatments can complement the approaches above. Over-the-counter anti-inflammatory medications reduce swelling and pain during flare-ups. Knee braces or sleeves can redistribute pressure away from the most damaged compartment of the joint. Ice after activity helps manage swelling, while heat before exercise loosens stiff tissue.
Custom orthotics or supportive footwear can subtly shift your gait to offload the affected side of the knee. Activity modification also plays a role: switching from running to cycling, or from stairs to ramps, keeps you moving while reducing the repetitive impact that aggravates symptoms.
When Surgery Becomes Necessary
Surgery enters the conversation when bone spurs and the underlying arthritis cause pain that limits your daily function despite months of non-surgical treatment. The clinical signs that typically prompt surgical evaluation include pain that wakes you at night, walking distances that have significantly shortened, persistent swelling after activity, and mechanical symptoms like the knee locking or catching.
Arthroscopic surgery, where a surgeon inserts a small camera and instruments through tiny incisions to shave down bone spurs and clean up loose debris, is sometimes offered. However, evidence for its effectiveness is modest. A Cochrane review found that 82 out of 100 people rated arthroscopic surgery a success at up to five years, but 74 out of 100 people who received a sham (placebo) surgery reported the same thing. That narrow gap suggests much of the perceived benefit may come from the placebo effect and natural healing rather than the procedure itself.
Total knee replacement is reserved for the most advanced cases, typically when imaging shows large bone spurs, severe narrowing of the joint space, hardening of the bone beneath the cartilage, and visible deformity of the bone ends. It’s indicated when pain is truly function-limiting and non-surgical treatments have been thoroughly tried. For people who reach that point, knee replacement reliably restores mobility and eliminates pain, with modern implants lasting 20 years or more in most patients.
Building a Treatment Plan That Works
The most effective approach for most people combines several strategies at once. Strengthening exercises four to five days per week protect the joint mechanically. Losing even a moderate amount of weight reduces the forces driving cartilage loss. Injections can bridge the gap during painful periods. Together, these treatments address both the symptoms you feel today and the biological process creating new bone spurs over time.
Bone spurs themselves don’t shrink or disappear with conservative treatment. The goal is to reduce the pain and inflammation they cause, slow further joint deterioration, and maintain enough function and mobility that surgery either becomes unnecessary or can be delayed for years. Many people manage bone spurs in the knee successfully for decades with this layered approach.