Knee arthritis responds to a combination of strategies, and most people get meaningful relief without surgery. The options range from targeted exercise and weight management to medications, braces, injections, and dietary changes. What works best depends on how far the arthritis has progressed, but nearly everyone benefits from starting with the least invasive approaches and building from there.
Strengthen the Muscles Around Your Knee
Exercise is consistently the single most effective non-drug treatment for knee arthritis. That might sound counterintuitive when your knee hurts, but the logic is straightforward: your quadriceps, hamstrings, and glute muscles act as shock absorbers for the joint. When they’re weak, more force transfers directly to the worn cartilage. Strengthening those muscles takes pressure off the joint and makes everyday movements like standing up from a chair, climbing stairs, and walking significantly easier.
Low-impact activities work best. Swimming, cycling, and water aerobics let you build strength without pounding the joint. Straight-leg raises, wall sits, and step-ups target the quadriceps specifically. Stretching the muscles around the knee also helps by reducing stiffness and improving your range of motion. A physical therapist can design a program matched to your current pain level and gradually increase intensity as you get stronger. The key is consistency: sporadic exercise doesn’t produce lasting results, but regular sessions over weeks and months can transform how your knee feels and functions.
Lose Weight to Reduce Joint Pressure
Every pound of body weight puts roughly four pounds of force on your knees when you walk. That means losing just 10 pounds removes about 40 pounds of pressure from the joint with every step. For someone who takes thousands of steps a day, the cumulative effect is enormous. Weight loss also reduces systemic inflammation, which contributes to cartilage breakdown.
Even modest weight loss, in the range of 5 to 10 percent of body weight, can produce noticeable improvements in pain and mobility. Combining dietary changes with the low-impact exercises mentioned above creates a reinforcing cycle: less weight means less pain during exercise, and more exercise makes it easier to maintain a healthy weight.
Topical Pain Relievers vs. Oral Medications
Over-the-counter anti-inflammatory gels and creams applied directly to the knee work surprisingly well. A large network meta-analysis published in Osteoarthritis and Cartilage found that topical anti-inflammatories were just as effective as oral versions for improving knee function, with no statistically significant difference between the two. The safety advantage, however, was dramatic: topical versions cut gastrointestinal side effects by more than half compared to oral anti-inflammatories, and real-world data from over 14,000 patients showed lower risks of cardiovascular problems and GI bleeding as well.
Acetaminophen (Tylenol) is often the first pill people reach for, but the same analysis found that topical anti-inflammatories actually outperformed it for function improvement. Acetaminophen also carried higher rates of GI side effects than the topical option, which challenges the common assumption that it’s the gentler choice. For knee arthritis specifically, a topical anti-inflammatory cream is a strong first-line option because the knee is close to the skin surface, allowing the medication to penetrate effectively.
Knee Injections: What to Expect
When pills and creams aren’t enough, injections directly into the joint offer another tier of relief. The two most common types are corticosteroid (cortisone) injections and hyaluronic acid (viscosupplementation) injections. Research comparing them head-to-head found similar modest improvements in pain and function at three and six months, with no significant difference between the two.
Cortisone injections tend to work faster, often providing relief within days, but their effects typically fade after a few weeks to a couple of months. Doctors generally limit cortisone injections to three or four per year in a single joint because repeated use may accelerate cartilage loss over time.
Platelet-rich plasma (PRP) injections are a newer option that uses a concentrated preparation of your own blood. Mayo Clinic researchers report a 60 to 70 percent chance of achieving at least 50 percent improvement in pain and function, with benefits lasting 6 to 12 months. PRP takes longer to kick in than cortisone, often requiring 3 to 6 months to reach full effect, but it tends to outperform both cortisone and hyaluronic acid at that point. PRP is not typically covered by insurance, and a single treatment can cost several hundred dollars.
Unloader Braces and Assistive Devices
If your arthritis primarily affects one side of the knee (which is common), an unloader brace can help. These braces apply a gentle force that shifts your body weight away from the damaged compartment and onto the healthier side of the joint. They’re particularly useful during activities that aggravate pain, like walking or standing for long periods. A cane used in the opposite hand from the affected knee also reduces joint load meaningfully.
Shoe inserts with lateral wedges can subtly change how force distributes through the knee during walking. These are inexpensive and worth trying, though results vary from person to person.
Diet and Inflammation
What you eat affects the level of inflammation throughout your body, including in your joints. The Mediterranean and DASH dietary patterns have both been linked to reductions in C-reactive protein, a key marker of inflammation. In practical terms, this means eating more fruits, vegetables, whole grains, fish, olive oil, and legumes while cutting back on processed foods, refined sugar, and red meat.
An anti-inflammatory diet won’t reverse cartilage damage, but it can reduce the chronic low-grade inflammation that accelerates joint breakdown and contributes to pain. Combined with weight management, dietary changes address two mechanisms at once.
Do Glucosamine and Chondroitin Work?
Despite their popularity, glucosamine and chondroitin supplements don’t hold up well under scrutiny. A 2024 meta-analysis in Osteoarthritis and Cartilage looked at whether adding these supplements to an exercise program improved outcomes and found no significant effect on knee pain or physical function compared to exercise alone. The pain reduction and functional improvement were statistically indistinguishable from placebo.
Some people report subjective improvement, and the supplements are generally safe, but the current evidence doesn’t support spending money on them when exercise, weight management, and anti-inflammatory strategies have much stronger backing.
When Surgery Becomes the Right Option
Knee replacement is not based on age or a specific X-ray finding. The American Academy of Orthopaedic Surgeons bases surgical recommendations on pain and disability that haven’t responded to other treatments. You might be a candidate if you have chronic knee inflammation and swelling that doesn’t improve with rest or medications, visible deformity (the knee bowing inward or outward), or pain and stiffness severe enough to limit daily activities like walking, getting dressed, or sleeping.
The important word is “failure”: surgery is typically considered after anti-inflammatory medications, physical therapy, injections, and lifestyle changes have all been given a fair trial without adequate relief. Modern knee replacements last 15 to 20 years or more, and most people return to low-impact activities within a few months of surgery. Partial knee replacements, which preserve the healthy parts of the joint, are an option when damage is limited to one compartment.