Hyaluronic acid injections, sometimes called knee gel injections or viscosupplementation, are a non-surgical treatment option for patients with knee osteoarthritis who are looking for an alternative to oral medication or surgery.
How Hyaluronic Acid Injections Work
Hyaluronic acid is a naturally occurring substance found in joint fluid, where it acts as a lubricant and shock absorber. In osteoarthritic knees, the joint fluid tends to break down and lose some of its natural cushioning ability. Hyaluronic acid injections are designed to supplement that fluid, with the goal of improving lubrication and reducing friction between joint surfaces during movement.
Treatment usually involves a series of injections directly into the knee joint, spaced roughly a week apart, though the exact protocol depends on the specific product used and your provider’s recommendation.
Who Might Be a Candidate
Hyaluronic acid injections are typically considered for patients with mild to moderate knee osteoarthritis who haven’t found enough relief from conservative measures like physical therapy, weight management, or over-the-counter pain relievers, and who want to explore options before considering knee replacement surgery. It’s not the right choice for every stage of osteoarthritis, which is why a knee evaluation and imaging review usually come first.
What the Research Shows
Research on hyaluronic acid injections for knee osteoarthritis is mixed. Some studies and patients report meaningful relief in pain and function for a period of months, while other research shows more modest benefit compared to a placebo. Because results vary by patient and by the severity of the arthritis, it’s generally presented as one option among several rather than a guaranteed fix, and it’s often used alongside physical therapy rather than in place of it.
What to Expect
The injection itself takes just a few minutes, and most patients return to normal activity the same day, with some providers recommending you avoid high-impact activity for a day or two afterward. The injections are generally well tolerated, and side effects like temporary swelling or soreness at the injection site are uncommon and typically resolve quickly.
Individual results vary, and hyaluronic acid injections are not guaranteed to eliminate knee pain. If you’re dealing with knee osteoarthritis and want to know whether this option makes sense for you, our Brooklyn team at Pain Therapy Care can walk you through an evaluation.
