Stopping works, and the length of the pause matters more than the act. Across surgery generally, a meta-analysis of randomised trials found preoperative cessation reduced postoperative complications by 41%, with each additional week of abstinence increasing the benefit by a further 19% and trials of at least four weeks showing a significantly larger effect (Mills et al., The American Journal of Medicine, 2011). That evidence comes from surgery as a whole, not from hair restoration specifically.

Nicotine replacement is not a neutral substitute. Patches, gum and vaping deliver the vasoconstrictor without the smoke. They remove one problem and keep the other, which is why the advice concerns nicotine rather than cigarettes alone.

The window that counts runs on both sides of surgery. The weeks before determine tissue condition; the weeks after cover the period when grafts are still establishing their blood supply.

Related terms

• Poor graft growth
• Ischemia time
• Hair transplant failure
• Hair transplant scarring

For how nicotine affects hair loss itself, see nicotine and hair loss. For the vaping question specifically, see vaping and hair loss.

Complications are common; failure is not. A systematic review of twenty-one observational studies covering 2,353 patients recorded a complication of some kind in 442 of them, most often pain, swelling and donor-area oedema rather than absent growth (Khatib, Skorochod & Wolf, Aesthetic Plastic Surgery, 2025). Most of what alarms patients in the early weeks belongs to that first group.

Design failure is the harder one. Yield can be added to if donor is left. A hairline in the wrong place, or hair pointing the wrong way, is corrected by taking grafts out — spending donor to undo donor already spent. That asymmetry is why planning carries more weight than any part of the surgery itself.

Related terms

• Poor graft growth
• Wrong hairline design
• Donor area depletion
• Shock loss
• Hair shedding vs hair loss

For the phase where a normal result looks worst, see the ugly duckling phase. For results that went wrong and what can be done, see hair transplant gone wrong.

Filled temples are the error people misname. When the frontotemporal angle is closed off, the hairline becomes a rounded arc across the forehead. Nothing about the front row is wrong; the shape is. It is corrected by opening the angle again, which means taking hair out rather than adding it.

Adding hair cannot undo a hairline that sits too far forward. Density behind a badly placed line only makes it more definite. Correction generally means removing grafts first, and every removed graft is donor that was already spent — which is why the first design matters more than any repair that follows it.

Related terms

• Hairline design principles
• Natural vs artificial hairline
• Micro-irregular hairline design
• Donor area depletion

For how a corrective procedure is planned, see revision hair transplant. For the wider set of outcomes that go wrong, see hair transplant gone wrong.

It is uncommon, and it is not what most bumps are. In the complications literature cysts are recorded as an infrequent finding, well behind pustules and folliculitis (Romera de Blas et al., Frontiers in Medicine, 2026). Most lumps in the first weeks are something else entirely.

Squeezing is the wrong instinct. A cyst has no opening to the surface, so pressure drives its contents sideways into surrounding tissue and can inflame an area that was quiet. Persistent lumps are assessed rather than treated at home.

The prevention is placement discipline. Depth matched to the graft, and no site filled twice, removes the mechanism entirely.

Related terms

• Channel opening depth
• Pitting after hair transplant
• Poor graft growth
• Keloid risk

For working out what a bump actually is, see pimples after a hair transplant. For pustules around the follicles themselves, see folliculitis after a hair transplant.

If a point does bleed, the published management is simple: continuous pressure with sterile gauze for five to ten minutes, until it stops. Continuous is the operative word — lifting the gauze to check restarts the process each time. Pressure is applied to the bleeding point, never rubbed across the grafted area.

What raises the risk is largely decided before surgery, and patients routinely under-report the second half of this list:

This is why a medication and supplement review before surgery is not a formality, and why blood pressure is controlled rather than noted.

What is not ordinary oozing: bleeding that is pulsatile, that continues after ten minutes of proper pressure, or swelling that expands and firms rather than settling. Those belong to the clinic the same day, not to the next scheduled contact.

Related terms

• Postoperative swelling
• Hair transplant anesthesia
• Donor area anatomy

For the first days hour by hour, see the hair transplant aftercare guide. For signs that point to infection rather than bleeding, see infection after a hair transplant.

These figures come from the published review of follicular unit excision complications (Romera de Blas et al., Frontiers in Medicine, 2026).

It does not threaten the grafts. Swelling sits in the tissue planes below and in front of the transplanted area; it is uncomfortable and it looks alarming, but it is not a sign that anything has gone wrong and it does not affect what grows.

What is not ordinary swelling: puffiness that is clearly one-sided, that begins or worsens after the first week, or that comes with fever, spreading redness or increasing pain. That pattern points away from fluid and toward infection, and it is worth a same-day message rather than a wait.

Related terms

• Hair transplant anesthesia
• Bleeding after hair transplant
• Hair transplant scarring

For how to sleep, position the head and manage the first days, see the hair transplant aftercare guide. For redness that outlasts the swelling, see redness after a hair transplant.

The scalp is an unusual site for it. Keloids form most readily on the chest, shoulders, upper back and earlobes, where skin tension is high. Scalp keloids do occur, but they are far less common than the concern suggests, and the nape at the lower edge of the donor area is the part most often involved.

Risk is identified from history, not from appearance. A personal or family history of keloids is the single most useful predictor, and susceptibility is higher in darker skin phototypes. That is a consultation question, asked before surgery is planned — because a keloid tendency changes where and how the donor is harvested, and in some cases whether surgery is advisable at all.

Related terms

• Hair transplant scarring
• Hair transplant for scars
• Cysts after hair transplant
• Donor area anatomy
• Scarring alopecia

For how hair type and skin affect surgical planning, see afro-type hair transplant. For how the donor area is assessed beforehand, see the donor area guide.

Scattered scarring is judged as a whole, not individually. A single extraction mark is invisible. Several hundred taken from too small an area merge into a diffusely pale, thinned patch, and at that point the problem is not the individual scars but the density lost between them.

Contrast decides visibility more than size. Pale marks on pale skin under pale hair disappear; the same marks on skin with strong hair-to-skin contrast are read from across a room. This is why donor discipline matters more for some patients than others, and why scarless describes no real technique.

Related terms

• FUT vs FUE
• Punch diameter selection
• Donor overharvesting
• Keloid risk
• Scarring alopecia

For camouflaging donor scarring with pigment, see scalp micropigmentation. For how the donor area is protected in the first place, see the donor area guide.

The cause is depth, set at the moment the site was made. A channel cut deeper than the graft lets it sink, and the skin heals over its edges. Nothing in aftercare produces pitting and nothing in aftercare prevents it — by the time the area has healed, the level is already fixed.

It is a texture problem, not a growth problem. Pitted grafts usually grow. The hair simply emerges from a slight hollow, so the surface catches light unevenly and looks uneven when the hair is short or wet. In dense placement it reads as an orange-peel texture rather than as separate dimples.

Correction is limited, so prevention carries the weight. Once healed, options are cosmetic — resurfacing, or camouflage with pigment — and none restores flat skin completely. Calibrating depth against real grafts at the start of the procedure is the only reliable control.

Related terms

• Channel opening depth
• Hair transplant scarring
• Cysts after hair transplant
• Graft implantation angle

For raised grafts, the opposite error, see cobblestoning after a hair transplant. For pigment camouflage of uneven scalp texture, see scalp micropigmentation.

It cannot be judged before the growth phase completes. Regrowth begins around the third to fourth month and is still filling in at nine. A verdict reached at month six is a verdict on an unfinished result, which is why genuine cases are counted at twelve months and not before.

The stages are cumulative and invisible to each other. A procedure can be flawless at extraction and still lose grafts on the bench. Because none of these leave a visible trace, a disappointing result is usually the sum of several small losses rather than one identifiable mistake.

Nothing regrows a follicle that did not survive. The answer to poor yield is another procedure using donor that has not yet been spent — which is why the donor left after the first session matters as much as the result of it.

Related terms

• FUE extraction science
• Graft handling and storage
• Ischemia time
• High density hair transplant
• Hair follicle anatomy

For the normal month-by-month course, see hair transplant growth stages. For how yield is measured overall, see hair transplant success rate.