Knee Arthritis: What to Try Before a Knee Replacement

Short answer: for most people with knee osteoarthritis, a structured exercise or physical therapy program, weight management where relevant, and pain medication your doctor approves are the best-supported first steps. Injections can buy time for some people. Replacement becomes a reasonable conversation when pain and lost function persist despite a genuine try at those options and imaging matches your symptoms.

This guide is not here to talk you out of surgery or into it. It is here to protect you from two expensive mistakes: having a major operation before you have tried what works, and spending months and money on treatments marketed far beyond their evidence.

First, understand where you are

Knee osteoarthritis is common and usually progresses slowly, with good and bad stretches. How you feel is not always tied to how your X-ray looks: some people with severe changes on imaging function well, and some with moderate changes hurt a lot. That is why the decision about surgery is mostly about your symptoms and function, with imaging used to confirm the picture.

Before comparing treatments, write down a baseline you can measure later:

• How far or how long you can walk before pain stops you
• Whether pain wakes you at night or keeps you from falling asleep
• Which daily tasks are hard: stairs, getting out of a chair, getting in a car
• What you have already tried, for how long, and what happened
• Your most recent standing (weight-bearing) knee X-rays and the date

That record makes any consultation, including a remote one with a surgeon in Colombia, far more useful than a description from memory.

The options compared

The American Academy of Orthopaedic Surgeons (AAOS) publishes a clinical practice guideline for knee osteoarthritis that grades treatments by the strength of the evidence. The table below summarizes the general picture in plain language. Your own doctor may weigh things differently for your health.

Plain-language summary of published guidance; it is not a treatment plan. Confirm what applies to you with a licensed clinician.

Exercise, PT and weight: the foundation

It can feel dismissive to be told “do exercises” when your knee hurts. But structured exercise is the best-studied treatment for knee arthritis, and it works through several routes: stronger thigh and hip muscles take load off the joint, better movement control reduces irritation, and regular activity often lowers pain sensitivity.

What a real trial looks like

1. Get a tailored programA physical therapist assesses your knee, hip strength and walking pattern, then sets exercises you can progress.
2. Give it timeBenefits typically build over weeks to months. A few sessions and a printed sheet is not a full trial.
3. Use pain as a guide, not a stop signYour therapist can explain what level of discomfort during exercise is acceptable for you.
4. Add low-impact activityCycling, water exercise and walking in manageable bouts are common options.
5. Track your baselineRe-check the walking distance, sleep and daily-task notes you wrote at the start.

If you carry extra weight, even a modest loss can reduce knee load and symptoms for many people. It is also worth doing if surgery is in your future, because surgeons often look at weight, blood sugar control and smoking status when assessing surgical risk.

Injections: what each one can and cannot do

Corticosteroid injections

A steroid injection can calm inflammation and give short-term relief, which some people use to get through a hard stretch or to make PT possible. Relief tends to wear off. If you are considering knee replacement, tell your surgeon about any recent injection, since many surgeons prefer a gap between an injection and surgery to lower infection risk. Ask yours what interval they use.

Hyaluronic acid

Often called “gel” or “lubricant” shots. The AAOS guideline does not recommend hyaluronic acid injections for routine use in knee osteoarthritis, because high-quality trials have not shown meaningful benefit over placebo for most patients. Some individuals still report relief, and practice varies between countries and doctors. If one is offered, ask what result the doctor expects and how they will judge whether it worked.

Platelet-rich plasma (PRP)

PRP uses a concentrate of your own blood. Research on PRP for knee arthritis is mixed, and products and protocols differ widely, which makes studies hard to compare. The AAOS guideline treats the evidence as limited, and recommendations from other groups vary. It is not a cartilage-regrowth treatment, and it is usually paid out of pocket.

Genicular nerve procedures

Some pain clinics offer procedures that target the small genicular nerves that carry pain signals from the knee, most commonly radiofrequency ablation. A related procedure, genicular artery embolization, is being studied as well. These can reduce pain in some carefully selected patients, but they do not repair or protect the joint, the evidence base is still limited, and relief may not be permanent. They can be an option for people who are not candidates for surgery, or who want to delay it, after a discussion with a specialist.

A caution about “stem cell” knee marketing

Clinics in many countries, including some marketed to medical travelers, sell “stem cell,” “regenerative” or “biologic” knee injections with claims of regrowing cartilage or avoiding replacement. Good-quality evidence does not support those claims. In the United States, the FDA has warned consumers about unapproved stem cell products and has not approved any stem cell product for knee arthritis.

If you are considering any treatment in Colombia, ask which regulator has approved the product or procedure and who is performing it. Colombia’s health product regulator is INVIMA, and licensed health professionals can be checked in the national registry (ReTHUS). Treat a clinic that cannot answer those questions as a warning sign.

Signals it may be time to talk about replacement

No single sign means you must have surgery. These are the signals that often lead surgeons and patients to discuss knee replacement seriously:

“Ready to talk about surgery?” checklist

• You have given exercise therapy and other first-line options a real try, and pain and function are still not acceptable to you
• Pain wakes you at night or makes it hard to sleep
• Your walking distance keeps shrinking, or you avoid trips and activities you value
• Stairs, chairs or getting in and out of a car are getting harder
• Standing X-rays show arthritis that matches where and how you hurt
• You are relying on more pain medication, or injections help less each time
• Your general health is optimized enough that a surgeon considers the risk reasonable

If several of these apply, a consultation with an orthopedic surgeon is reasonable. If only one or two apply, it may still be worth asking whether you have run out of non-surgical options or simply have not tried them fully yet. When in doubt, a second opinion is a sensible step before booking travel.

The right time for a knee replacement is decided by your pain, your function and your imaging together, not by a sales pitch for or against surgery.