Smoking and Nicotine Before Surgery

By Nick Peplow·Gender-affirming surgery coordinator

Last reviewed 27 September 2026· How this site is researched

Every other requirement on this pathway bends somewhere. Weight limits vary, hormone rules differ between surgeons, letters can be argued about. This one does not bend. If a surgeon tests you on the morning of surgery and the test is positive, the theatre slot goes to someone else, and I have watched that happen to people who had spent two years and a great deal of money getting to that morning.

It is a plumbing problem, not a moral one

Nicotine narrows small blood vessels. That is its main effect here and it is enough on its own. Smoke adds carbon monoxide, which takes up space on the red cells that oxygen should be occupying, along with a long list of compounds that slow healing and raise infection rates.

Put those together and you get a tissue supply problem. Large arteries cope. What suffers is anything living at the far end of the smallest vessels, which is precisely what these operations create. Surgeons are not making a judgement about you when they insist on this. They are telling you that there is no move available in theatre that compensates for a poor blood supply, and that if the tissue fails they cannot put it back.

Where it bites on this pathway

Three places in particular, and they are the three places where a failure is expensive to fix.

Scalp flaps. Hairline advancement works by lifting the hair-bearing scalp forward and holding it there. The flap arrives with its own blood supply but under tension, and the hair follicles at the leading edge are the most vulnerable tissue in the whole facial feminisation list. Nicotine there risks a strip of permanent hair loss or a wound that opens along the incision, either of which shows.

Nipple position in breast surgery. Straightforward implant placement in a chest with good tissue is relatively forgiving. It stops being forgiving when the plan involves moving the nipple, whether that is a lift done alongside augmentation or a repositioning to suit a wider chest. A relocated nipple depends on a narrow pedicle of tissue, and partial loss of one is the classic nicotine complication. Breast augmentation and implants cover how that plan gets made.

The lining of a canal. This is the strictest of the lot. Vaginoplasty takes skin from where it was, moves it inward, and asks it to survive in a new place with a new supply while sitting in the most bacterially hostile part of the body. Add a graft to that and you have tissue with no supply at all for the first few days, waiting for vessels to grow into it. Necrosis of that lining is among the worst outcomes in this operation, and surgeons who are relaxed about nicotine for a tracheal shave get very unrelaxed about it here. The peritoneal approach uses different tissue, which changes the details rather than the rule.

Wound healing everywhere else is worse too, and scars come out wider. Smokers also do measurably worse under general anaesthetic, with more airway irritability and more chest complications afterwards.

What counts

More than people expect. The requirement is usually about nicotine, not about smoke, so most of this list is caught even where there is nothing burning.

• Cigarettes, roll-ups, cigars, pipe tobacco, shisha
• Vapes and e-cigarettes containing any nicotine
• Pouches, snus and chewing tobacco
• Patches, gum, lozenges and sprays, unless your surgeon has specifically cleared them
• Cannabis rolled with tobacco; cannabis on its own is a separate question with its own anaesthetic implications, so disclose it either way

Nicotine replacement is the one people genuinely do not expect, and it catches people out because they were doing the right thing. Some surgeons allow patches early in the stop period and then want you off them for the last stretch. Others treat them exactly like cigarettes. Ask for the actual wording rather than assuming, because "stop smoking" and "be nicotine-free" are different instructions.

How long, either side

The windows I see quoted run from around a month to several months before surgery, with the longer end reserved for vaginoplasty and for facial work involving a scalp flap, and the shorter end for brief procedures such as an orchiectomy or a tracheal shave. Your surgeon's number is the one that counts and you should get it in writing.

Then there is the part that gets skipped. The period after surgery matters at least as much as the period before, because grafts and flaps do their surviving in the first fortnight and healing carries on for months. People hold the line perfectly for six weeks, get through the operation, and light one on day four of recovery because the worst is over. The worst is not over on day four.

If I had one piece of advice, it is to start earlier than the minimum. Aiming well beyond the requirement means a bad week does not cost you the date.

Testing, and slipping

Expect to be tested if you are having genital surgery or anything involving a flap. The usual test looks for cotinine, which is what your body turns nicotine into, and it stays detectable for a few days after the last exposure and longer in heavy users. Some clinics test at the pre-op appointment, some on the morning, some both. Read the cancellation policy before you need it, because a positive result on the day usually means losing the slot and some or all of what you have paid.

If you slip, say so. One cigarette a month out is a different situation from a daily habit you have concealed, and told about it the surgeon can decide whether to proceed, delay, or adjust the plan to something less dependent on marginal blood supply. Undisclosed, it becomes a complication nobody was expecting. Every surgeon I have worked with would rather be told, and none of them have been surprised.