For most knee joint pain, an over-the-counter anti-inflammatory is the best starting point. Oral NSAIDs like ibuprofen and naproxen provide short-term improvement in both pain and function, and topical versions applied directly to the knee work just as well while putting far less medication into your bloodstream. Beyond these basics, several supplements and other options can help depending on the type and severity of your pain.
Over-the-Counter Anti-Inflammatories
NSAIDs (ibuprofen, naproxen, aspirin) are the most widely recommended first-line treatment for knee pain caused by osteoarthritis or general inflammation. They reduce swelling and block pain signals at the same time, which is why they tend to outperform acetaminophen for joint-specific pain. The key rule: use the lowest dose that controls your symptoms, for the shortest stretch of time you can manage.
Long-term or frequent NSAID use carries real risks. All NSAIDs increase cardiovascular risk, including blood pressure elevation and fluid retention, even in people with no heart disease history. They can also irritate the stomach lining and affect kidney function over time. These risks apply to both prescription and over-the-counter versions, so treating NSAIDs as a daily habit rather than a short-term tool is worth reconsidering if you’ve been doing it for months.
Acetaminophen is a fallback option. It’s gentler on the stomach and cardiovascular system, but it’s less effective for inflammatory joint pain because it doesn’t reduce swelling. It can help if NSAIDs aren’t an option for you.
Topical NSAIDs for Targeted Relief
If your pain is specifically in the knee (rather than multiple joints), a topical NSAID gel is worth trying before or instead of pills. Applied directly to the skin over the joint, these gels deliver the active ingredient locally while dramatically reducing how much enters your bloodstream. Pooled clinical trial data from Johns Hopkins found that topical diclofenac gel significantly outperformed placebo for both pain and physical function over 12 weeks, in adults under 65 and over 65 alike.
Topical and oral NSAIDs provide equivalent short-term pain relief for knee osteoarthritis specifically. The knee is one of the best joints for topical treatment because it sits close to the skin surface, allowing the medication to penetrate effectively. For deeper joints like the hip, topical options are less practical.
Curcumin Supplements
Curcumin, the active compound in turmeric, has the strongest evidence of any natural supplement for knee pain. In clinical trials, doses as low as 250 mg twice daily significantly outperformed placebo across multiple pain measures. The Arthritis Foundation notes that experts recommend 500 mg of high-quality curcumin twice a day for osteoarthritis.
The catch is absorption. Only about 2 to 3% of standard curcumin actually reaches your bloodstream. To get meaningful levels, look for formulations designed to improve bioavailability. These use black pepper extract (piperine), phospholipid complexes, or nanoparticle technology. Taking curcumin with a meal that includes some fat also helps absorption. Plain turmeric powder sprinkled on food won’t deliver a therapeutic dose.
Glucosamine and Chondroitin
These are the most popular joint supplements on the market, but the evidence is genuinely mixed. A large combined analysis of 29 studies involving over 6,000 people found that glucosamine or chondroitin taken separately did significantly reduce pain, but taking them together showed no clear benefit. Individual study results were inconsistent, with some showing meaningful improvement and others showing none.
Medical organizations are split. The American College of Rheumatology and the Arthritis Foundation strongly recommend against using glucosamine or chondroitin for knee osteoarthritis, stating the best data don’t show important benefits. The Osteoarthritis Research Society International agrees. On the other hand, the American Academy of Orthopaedic Surgeons lists them as potentially helpful for mild-to-moderate knee osteoarthritis, and a European expert group strongly recommends prescription-grade crystalline glucosamine sulfate specifically, while discouraging other formulations.
If you decide to try them, the formulation matters. Prescription-grade crystalline glucosamine sulfate has better evidence behind it than the glucosamine hydrochloride commonly sold in U.S. supplement stores. Give it 8 to 12 weeks of consistent daily use before judging whether it helps. If nothing has changed by then, it’s reasonable to stop.
Omega-3 Fatty Acids
Fish oil supplements have anti-inflammatory properties that may help with joint pain, though the evidence is stronger for rheumatoid arthritis than for osteoarthritis. Clinical trials have typically used doses containing roughly 2 g of EPA and 1.2 g of DHA daily, which is considerably more than what a standard one-capsule-a-day fish oil supplement provides. You’d likely need 3 to 4 large capsules daily to reach those levels.
Reviews of the research have found inconsistent results. Some suggest omega-3s reduce joint swelling, pain, and morning stiffness. Others find that the main benefit is allowing people to reduce their NSAID use rather than directly improving symptoms. If you already eat fatty fish several times a week, supplementation may add little. If your diet is low in omega-3s, it’s a reasonable addition with benefits beyond your joints.
Injections for Persistent Pain
When oral and topical options aren’t enough, corticosteroid injections directly into the knee joint can provide short-term relief. These work by calming inflammation inside the joint itself and typically take effect within a few days. The relief is temporary, usually lasting weeks to a few months, and repeated injections over time may actually accelerate cartilage breakdown, so most providers limit how often they’re given.
Hyaluronic acid injections (sometimes called viscosupplementation) are another option. These aim to restore the lubricating fluid in the joint. Head-to-head comparisons with corticosteroid injections have found no significant differences in pain or function at three or six months. Hyaluronic acid injections require a series of visits rather than a single shot, and insurance coverage varies.
What to Try First
For mild to moderate knee pain, start with a topical NSAID gel applied directly to the knee. It carries fewer systemic risks than pills and works just as well for this particular joint. Add curcumin (500 mg twice daily of a bioavailability-enhanced formula) if you want a supplement with reasonable evidence behind it. Use oral NSAIDs at the lowest effective dose when you need stronger relief, but avoid making them a daily long-term habit without weighing the cardiovascular and gastrointestinal tradeoffs.
Glucosamine and omega-3s are lower-certainty options that some people find helpful. Commit to at least 8 to 12 weeks before deciding they aren’t working. For pain that doesn’t respond to these approaches, corticosteroid injections offer a next step with fast-acting but temporary results.