Does Smoking Really Affect Surgery?

When preparing for surgery, most people will listen to their doctor and prep accordingly by, for example, either fasting or not fasting. But have you ever considered looking at your daily habits as part of your preparation? Most people don’t know that if you are using nicotine products, whether cigarettes, e-cigarettes or nicotine pouches, this directly impacts how you heal and impact your recovery. Quitting nicotine before surgery gives your body the best chance to heal, reduces your risk of complications and supports a smoother experience overall.

What is the real impact of nicotine on your body?

When you remove nicotine from your daily routine, your body begins to heal itself right away. While research has often focused on tobacco products, it’s clear that quitting any form of nicotine, whether cigarettes, vaping or pouches, helps your body restore its natural balance. Circulation improves, oxygen levels in your blood rise and your immune system grows stronger. Each positive change supports your body’s ability to repair wounds, fight infections and recover faster after surgery.

One of the biggest downsides of smoking is that nicotine forces your heart to work harder. It increases your heart rate and narrows your blood vessels. This puts unnecessary strain on your circulatory system. When your blood vessels narrow, less oxygen-rich blood reaches your tissues, and your body needs that oxygen to repair wounds or fight off infections.

Using nicotine also causes the following physical changes:

Weakens the immune system: Your body loses its natural ability to defend against illness and infection.
Increases the risk of arrhythmias: It can cause an irregular heartbeat.
Damages blood vessels: It harms the walls of your blood vessels, negatively affects blood fat levels, and makes your blood platelets clump together easily.
Increases cellular damage: Nicotine creates oxidative stress, which damages your cells and slows down your body's recovery process.

How does nicotine complicate surgery?

When you undergo surgery, your body experiences a controlled trauma. To recover, it needs all its resources. Nicotine blocks those resources, leading to a harder and longer recovery.

Research shows that smokers and nicotine users face a much higher risk of surgical complications. These risks include:

More intense pain: Patients who smoke often report feeling higher levels of pain after their procedure.
Increased bleeding: Smokers tend to bleed more during surgery.
Slower healing: Wounds and bones take much longer to heal because the tissues lack proper blood flow.
Higher risk of infection: For smokers, the risk of a surgical site infection is roughly six times higher than for non-smokers. If you smoke on the actual day of your surgery, that risk jumps to twelve times higher.
Lung complications: Smoking significantly raises the risk of breathing problems after being under anesthesia.

Does the type of surgery matter when using nicotine?

Nicotine negatively affects all surgeries, but it causes more severe problems for specific types of operations. Elective procedures aimed at improving your quality of life require a strong personal commitment to your treatment plan. Staying entirely nicotine-free is a major part of that commitment.

Quitting is very important before having:

Cancer surgeries
Joint replacements (like knee or hip surgeries)
Vascular (blood vessel) surgeries
Any procedure that inserts metal or foreign matter into the body
Foot and ankle surgeries
Spinal and back surgeries

How does nicotine affect fractures and orthopedic surgeries?

If you need surgery to fix a broken bone or replace a joint, nicotine dramatically slows down the healing process. For example, if you have a lower leg fracture, smoking can double the time it takes for your bone to heal. Patients who quit before surgery are less likely to need a second operation because their bodies get the full benefit of the initial procedure.

What is the impact of nicotine on back surgeries?

Quitting nicotine before spinal surgery gives your body the best chance to heal well and recover without extra problems. Those who stay nicotine-free are less likely to have lingering back pain, and their bones and discs are more likely to heal properly. Avoiding nicotine can also mean less bleeding during surgery and a much better shot at getting the full benefits from your procedure.

Can you have surgery if you smoke, vape or use nicotine?

You might wonder if doctors will refuse to operate on you if you smoke or vape. At Ochsner Health, our highest priority is your safety and well-being. If you are facing a life-threatening emergency or a serious illness, your care team will always move forward with the urgent procedures needed to protect your life. In immediate situations, your health comes first.

However, for elective surgeries, procedures planned in advance to improve your life, your doctor will evaluate the risks. Smoking plays a large role in deciding if the benefits of the surgery outweigh the dangers. Because nicotine limits your ability to heal, doctors ask you to stop using it before they move forward with a planned procedure.

For elective surgeries, which are procedures planned in advance to improve your quality of life, our commitment to achieving the best possible results means your surgical team will carefully evaluate all risks and benefits. Smoking plays a large role in deciding if the benefits of the surgery outweigh the dangers. Because nicotine severely limits your ability to heal, doctors ask you to stop using it before they move forward with a planned procedure.

Does vaping carry the same surgical risks as smoking?

Vaping avoids smoke byproducts but still delivers nicotine that reduces blood flow and slows healing. Some aerosols can irritate the airways and increase anesthesia and respiratory risks. For surgery, the safest option is to stop all nicotine products.

What are the benefits of quitting before your procedure?

The good news is that your body has an ability to heal itself once you stop using nicotine. The sooner you quit before your surgery, the better your results will be. Every single nicotine-free day improves your chances of a successful, complication-free recovery.

Consider how quickly your body responds when you quit:

One day before surgery: Harmful carbon monoxide levels drop, and the gas leaves your bloodstream.
Two days before surgery: Your body successfully clears out the nicotine.
Six to eight weeks before surgery: Your immune system grows stronger, and your risk of getting a severe infection drops significantly.
Eight to twelve weeks before surgery: Your lungs begin to cleanse themselves, drastically reducing your risk of breathing complications after anesthesia.

How long before surgery should I quit?

Many surgeons advise at least four weeks nicotine-free before surgery and four weeks after. Longer is better, especially for bone healing and complex reconstructions. Discuss timelines specific to your procedure with your surgeon and remember, the best day to quit smoking is now.

Will my surgeon test for nicotine?

Some surgeons use blood, urine or saliva tests for nicotine metabolites to confirm abstinence, especially for surgeries that rely on strong blood supply or bone fusion. Ask your surgeon about their approach and how it relates to how nicotine use affects surgery success.

What if I cannot quit in time?

Quitting even a few days before surgery improves oxygenation and reduces airway reactivity. Tell your team exactly what you use and when you last used it. They can tailor anesthesia and postoperative care and help you stop immediately.

How can you partner with Ochsner for a healthier recovery?

Preparing for surgery is a team effort, and you are the most important member of that team. Choosing to stop using nicotine is one of the bravest and most effective decisions you can make for your long-term health. We know that quitting is not easy, but you do not have to do it alone.

By stepping away from nicotine, you take an active role in your healing. You give your body the oxygen, strength and resources it needs to recover fully. At Ochsner Health, we support our patients through every step of their health journey. If you need help quitting smoking or vaping before your surgery, we have the expert resources and compassionate care to guide you toward a successful recovery.

To learn more, visit Smoking Cessation.