Total Knee Replacement Recovery
Total Knee Arthroplasty
What a knee replacement is
A knee replacement resurfaces the worn ends of the bones that form the knee. A few millimetres of damaged surface are removed from the end of the thigh bone and the top of the shin bone and replaced with metal, with a smooth plastic bearing between them. The kneecap surface is sometimes resurfaced as well.
Why it is done
Almost always because arthritis has worn the cartilage away and the pain has stopped responding to everything else — typically pain with walking and stairs, stiffness after sitting, and a knee that has started deciding what a person can do.
The honest comparison with a hip replacement
A knee replacement asks more of you than a hip does. It is generally more painful in the early weeks, the swelling lasts longer, and the range of movement has to be worked for rather than simply returning. If someone told you their hip replacement was straightforward, that is often true and it is not the same operation. Knowing this up front makes the first month considerably easier to interpret.
Swelling
Swelling is the single most persistent feature of this recovery. The knee is usually swollen, warm, and stiff for weeks, and it commonly fluctuates — better in the morning, worse after a day on your feet. Some degree of swelling can persist for six months or more, and it is the main reason the knee feels tight.
Range of motion — the part that takes work
Bending and straightening are what this recovery is really about. The knee stiffens quickly if left alone, and regaining movement is easiest in the first six to twelve weeks — the window matters. Straightening fully is at least as important as bending, and is often the part people neglect because bending feels like the achievement.
Pain and sleep
Pain is generally highest in the first two weeks and eases steadily after that. Night-time is often the worst of it, and disturbed sleep for several weeks is common and normal. Most people move off stronger medication over the first few weeks, and it is worth staying comfortable enough to keep doing the exercises.
Ice and elevation
These are more useful here than after most operations, because so much of the early difficulty is swelling. Elevating the leg properly — foot above the level of the heart rather than just up on a stool — makes a noticeable difference to how the knee feels and moves.
The incision and numbness
The incision runs down the front of the knee. A patch of numbness on the outer side of it is expected — a small skin nerve is unavoidably crossed — and it may shrink over a year or two without disappearing entirely. It is not a problem, just a permanent oddity for many people.
Walking and stairs
Most people are up and walking the same day or the next with a frame or crutches. Stairs are usually managed one at a time at first, leading up with the stronger leg and down with the operated one. Walking without aids generally comes within a few weeks.
Driving
Driving generally becomes reasonable once you are off stronger pain medication, can bend the knee enough to get in comfortably, and could perform an emergency stop without hesitating. For a right knee that is commonly four to six weeks; a left knee in an automatic is often sooner.
Returning to work
Desk-based work is often possible within four to six weeks, with the leg elevated where possible and regular movement. Work involving standing, kneeling, or climbing takes longer — commonly around three months — and your surgeon will guide the timing.
Kneeling
Kneeling is usually uncomfortable rather than harmful, and many people never find it fully comfortable again. It does not damage the replacement. Where kneeling matters for work or worship, a pad helps and it is worth raising with your surgeon rather than assuming it is off the table.
Physical therapy
Therapy matters more here than after almost any other joint replacement, because movement genuinely has to be earned. The daily work at home between sessions is what determines the result more than the sessions themselves. This is the operation where doing the exercises properly changes the outcome.
How the first year usually unfolds
The first two weeks are the hardest — swelling, disturbed sleep, and working on movement. Weeks two to six generally bring steady gains in bend and a return to walking without aids. From six to twelve weeks the knee starts feeling like part of you again. Between three and six months most daily activity returns, and the last of the swelling and stiffness typically settles across the remainder of the first year.
Staying in touch with your care team
Recovery varies with your starting stiffness, how long the knee was worn, and how the swelling behaves. Your own surgeon knows those details and what to expect. If something about your recovery is worrying you, or your movement seems to be going backwards rather than forwards, contact your care team — that last one in particular is worth raising early.
Exercises for Total Knee Replacement
An illustrated, phase-by-phase exercise program for this procedure. View the Total Knee Replacement exercise program.
Recovery education · Condition guides · Exercise programs
Are you a clinician? See how orthopedic practices use JointBooklet.
This guide is general education and doesn't replace evaluation by a licensed provider. Recovery and treatment vary by person — follow the guidance of your own surgeon or care team.