Smoking and Joint Replacement
Of everything that can be optimized before a joint replacement, smoking is where I hold the firmest line. I will not schedule an elective joint replacement for someone who is still smoking. Stopping meaningfully reduces the risk of infection and improves skin healing and blood flow to the limb — and unlike most risk factors, this one is entirely within your control.
Key takeaways
- I will not schedule an elective joint replacement for a patient who is still smoking.
- Smoking raises the risk of infection, and infection is the complication that undoes the operation.
- It also impairs skin healing and reduces blood flow to the limb — both matter for a healing incision.
- Stopping around six weeks before surgery produces measurable improvement in all three.
- This is an elective operation meant to last your lifetime, which is exactly why it is worth optimizing.
- The 2025 ACR/AAHKS guideline still supports delaying surgery for active nicotine use.
- Of the modifiable risk factors, this is the firmest line — firmer than weight, and firmer than A1c.
- It is also the one most fully within your control, which is why it is worth the effort.
The short answer
I will not schedule an elective joint replacement for someone who is still smoking.
That is a firmer line than I hold on almost anything else, and it is worth explaining rather than just stating. It is also not a permanent refusal — patients who stop go on to have their surgery.
What smoking actually does
Three effects, and they compound on each other in exactly the wrong place.
- It raises the risk of infection — and a prosthetic joint infection is the complication that undoes the whole operation
- It impairs skin and wound healing, which matters directly for an incision sitting over a new implant
- It reduces blood flow to the limb, and blood flow is what healing tissue depends on
Any one of those would be a concern. Together, in an operation where a piece of hardware is under the wound, the margin for a wound that heals poorly is small.
Why infection drives everything
Almost every decision made before, during and after a joint replacement is aimed at avoiding infection — because it is the complication that changes everything. It can mean further surgery, months of antibiotics, implant removal and replacement, and a final result that never matches what it should have been. More on the full picture in knee replacement complications.
The six-week window
This is the practical number to plan around. Stopping around six weeks before surgery produces measurable improvement — the infection rate falls, skin healing improves, and blood flow to the extremity gets better.
Sooner is better and longer is better still. What does not work is treating it as a formality on the morning of surgery. The body needs time for those changes to actually happen, which is why this has to be planned rather than promised.
One operation, for the rest of your life
Here is the reasoning underneath all of it.
A joint replacement is meant to be one operation that lasts the rest of your life. The entire goal is that we do it once and never have to redo it. That is also what makes it worth preparing for properly.
The way I put it to patients is that you are training for a marathon. You want to arrive in the best condition you can manage — with an honest asterisk, because everyone's best condition is different, and I am not asking anyone to become somebody they are not.
But some things on that list are genuinely straightforward. Stopping smoking is the clearest one, and the return on it is immediate and large.
Why this is my firmest line
It is worth seeing this in context with the other things we optimize before surgery, because I am not equally rigid about all of them.
- Weight — I have no strict cutoff. There are patients whose disability justifies operating at a higher BMI, and the guidelines now back that flexibility
- A1c — firmer. I prefer under 7 and my working cutoff is 7.5, but between 7.5 and 8 there is a genuine conversation to be had
- Smoking — a hard line. This one I do not negotiate
The difference is that smoking adds risk squarely to the complication that would ruin the operation, and it is the one item on the list that sits entirely within your control. You can read the reasoning on the other two in BMI and joint replacement and diabetes, A1c and joint replacement.
What the guidelines say
This is not just my position, and it is worth knowing where the professional guidance sits.
In June 2025 the American College of Rheumatology and the American Association of Hip and Knee Surgeons published a guideline in Annals of Internal Medicine that conditionally recommends against delaying surgery solely to reach a target BMI — while explicitly continuing to support delaying surgery for poorly controlled diabetes and for active nicotine use.
So the field has moved toward flexibility on weight while holding firm on this. That is not arbitrary; it reflects where the evidence is strongest.
Getting it done
Quitting is genuinely hard, and I would rather help you plan it than pretend otherwise.
- Start early — this needs to happen before surgery is scheduled, not after a date is set
- Involve your primary care physician; structured cessation support and medication work far better than willpower alone
- Tell us about any nicotine use, including vaping or replacement products — much of the concern is nicotine itself, which constricts blood vessels
- Use the surgical date as the target. A lot of people find quitting easier with a concrete reason and a deadline
If you have tried before and it has not worked, say so rather than leaving it unmentioned. It is not a character test, and there is more help available than most people realize.
And if you have been told you cannot have surgery until you stop, that is a real requirement rather than an arbitrary one — but you should leave with a plan and a timeline, not just a closed door. A second opinion is always reasonable if you would like another view on where you stand.
Frequently asked questions
Can you have a joint replacement if you smoke?
Not with me, and not while you are still smoking. This is an elective operation intended to last the rest of your life, and smoking measurably raises the risk of the one complication that would undo it. I hold a hard line here — you cannot be smoking and have this operation. That is not a permanent refusal; patients who stop go on to have their surgery.
How long do you have to quit smoking before a knee or hip replacement?
Around six weeks before surgery is the window where we see meaningful improvement — infection risk falls, skin healing improves, and blood flow to the limb gets better. Sooner is better, and longer is better still. The important thing is that this is not a token gesture on the morning of surgery; the body needs time for those changes to happen.
Why does smoking matter so much for joint replacement specifically?
Three reasons that all compound. It raises the risk of infection, and a prosthetic joint infection is the complication that changes everything about an outcome. It impairs skin and wound healing, which matters directly for an incision over a new implant. And it reduces blood flow to the extremity, which is what the healing tissue depends on. When an implant is involved, the margin for a wound that heals poorly is small.
Do the guidelines support refusing surgery over smoking?
Yes. In June 2025 the American College of Rheumatology and the American Association of Hip and Knee Surgeons published a guideline in Annals of Internal Medicine that conditionally recommends against delaying surgery solely to reach a target BMI — but which explicitly continues to support delaying for poorly controlled diabetes and for active nicotine use. So professional guidance has moved toward flexibility on weight while holding firm here.
What about vaping, nicotine patches, or nicotine gum?
Tell your surgeon about any nicotine use, in any form. Much of the concern with smoking comes from nicotine itself, which constricts blood vessels and reduces blood flow to healing tissue, so it is not simply about smoke. Whether a particular substitute is acceptable as part of quitting is a conversation to have directly rather than an assumption to make — bring it up specifically.
Is it really fair to refuse surgery over this?
I understand why it feels harsh, and I do not say it lightly. The reasoning is that this is an elective operation whose entire purpose is to give you a joint that lasts. If there is something we can do to reduce the chance of the complication that would ruin it, we should do it — particularly something that costs nothing but effort. I would rather have a difficult conversation now than treat an infected implant later.
What if I have tried to quit and cannot?
Say so, rather than not mentioning it. Quitting is genuinely difficult and it is not a character test. Your primary care physician can help with structured cessation support and medication that make it far more achievable than willpower alone, and having a specific surgical date to work toward helps a lot of people. Start that conversation early — it needs to happen before the operation is scheduled, not after.
This article is for general education and is not a substitute for personalized medical advice. Recovery timelines vary by patient, procedure, medical history, and surgeon-specific protocol. Please consult Matthew Harb, M.D. about your specific condition.
What patients say
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