Hair transplant side effects: normal healing and genuine complications

Normal aftermath or complication: where the line falls

A normal reaction follows a calendar. It turns up when it is expected, it peaks, it fades without any particular treatment. It leaves nothing behind.

A complication fits no calendar. It gets worse instead of better, it is often one-sided, and it calls for a medical decision. That is the most useful test day to day: anything still worsening after several days is never part of normal healing.

The scale is worth setting out. Across a series of 2,896 patients operated on over ten years, not one major or life-threatening complication was recorded. The incidents logged were dominated by sterile folliculitis, an inflammation around the follicle with no germ involved, in 203 patients, by true infection in only 2 patients with diabetes, and by three cases of small patches of necrosis. We go through that whole picture in our article on the risks of a hair transplant.

The normal aftermath almost everyone goes through

Swelling leads the way, in those it affects. Fluid from the anaesthetic and from the inflammatory response drains down towards the forehead and then the eyelids, between the second and the seventh day. How often it occurs depends a great deal on the team’s anaesthetic protocol: in recent series it falls to a few per cent when the injected solution is properly managed. Our full guide to swelling after a hair transplant sets out the precise timeline. No effect on the grafts.

Redness comes next. Erythema, a pink flush of the skin, around each graft is the rule for a few weeks, particularly on fair skin. A study of 1,090 patients measured how severe it became: mild in 16.33% of them, moderate in 5.14%, severe in under 1%.

One nuance matters here, and it runs against what you will read elsewhere. Mild forms are unremarkable. Marked forms are not: the patients concerned lost more hair shafts and showed a lower graft survival rate. Two factors came out of the analysis, and both are ones you can act on: the presence of folliculitis, and a first wash started too late. One more reason to follow the protocol for washing your hair after a transplant to the letter.

Bruising sometimes appears around the eyes towards the third day, purple and then yellow. It goes within a week, and we devote a whole article to bruises after a hair transplant.

Numbness of the donor or recipient area is reported by a minority of patients. The small nerve endings that were cut regrow slowly: allow several weeks, sometimes a few months. Sensation does come back.

Shock loss closes the list, and it alarms a great many people. Two sheddings follow one another and are often confused. During the first three weeks the visible shaft of the implanted hairs detaches: that is part of the plan. Then, between the second and the eighth week, neighbouring native hairs can fall out in their turn, and that is shock loss proper. In both cases the follicle stays in place under the skin and regrowth begins around the third month. It is all explained in our article on shock loss.

A little occasional bleeding in the first few hours also belongs to the normal register.

Crusts, washing and itching

Every micro-incision forms a small brownish crust. They come away by themselves between the seventh and the fourteenth day, helped along by the gentle washes prescribed. Picking them off is the real risk: a graft can leave with one. Our article on crusts after a hair transplant describes the right way to go about it.

Then comes the itching, from the second week onwards. It is a sign of healing. It settles with the moisturising set out in the post-operative instructions.

Take care not to confuse crusts with small spots. The latter are often folliculitis, which we come to further down.

Tiredness, headaches, pain

A six to eight hour procedure is tiring. The first 48 hours often bring headaches, linked to the anaesthetic infiltration and to the tightness of the scalp.

Pain itself stays moderate in the great majority of patients: discomfort when pressure is applied to the donor area, a feeling of tightness, nothing that a simple painkiller will not deal with. Our article on pain after a hair transplant gives the benchmarks. Pain that increases from the third day onwards, on the other hand, changes category: it must be reported.

The genuine medical complications

Folliculitis is by far the most frequent. It is an inflammation around the follicle that shows up as small spots, sometimes containing pus. A multicentre study of 1,317 patients recorded an incidence of 12.11%. The window is very wide: from two days to six months, with an average onset around the sixth week. Most lesions heal on their own, without scarring and with no consequence for regrowth. Extensive forms warrant a topical treatment, sometimes an antibiotic. Our explanations on spots after a hair transplant set out what to do.

True bacterial infection, on the other hand, is rare. Of the 2,896 patients in the series quoted above, it affected two people, both of whom had diabetes. The signs are clear: spreading redness, heat, growing pain, discharge, fever. It responds well to treatment when advice is sought early. Our article on infections after a hair transplant describes the timings and the warning signs.

Necrosis of the scalp, meaning tissue that dies off, is exceptional. It occurs when the blood supply to an area is compromised, generally after incisions that were too dense or too deep, or in a patient whose ground is weakened by smoking or by poorly controlled diabetes. Three small patches were observed in the series of 2,896 patients. It leaves a scar.

Anaphylactic shock, a severe allergic reaction, to local anaesthetics and compressive haematomas, collections of blood under the skin, appear in the literature as isolated cases. They warrant a serious allergy history before the procedure, not anxiety.

Scars: what depends on the technique

All surgery leaves a mark. How visible it is depends on the harvesting method.

The FUT technique, which removes a strip of scalp, leaves a linear scar at the back of the head. It can develop into a thickened form, described as hypertrophic, in patients predisposed to it. FUE takes the grafts one by one and leaves nothing but minute white dots, invisible as soon as the hair is more than a few millimetres long. Keloids, those scars that spread beyond the wound itself, remain exceedingly rare: a single case in the series of 2,896 patients. Our article on hair transplant scars compares the two situations.

The most common complication is not a medical one

In the series of 2,896 patients, the infections can be counted on the fingers of one hand. The patients disappointed with their result number 26. The ratio leaves little room for argument.

A frontal line drawn too low or too straight, density that falls short on a baldness that will carry on progressing, grafts implanted at an angle that does not follow natural growth, a donor area exhausted by a first procedure that took too much: none of that is a surgical accident. These are planning errors. They are decided beforehand, at the consultation, when the indication and the strategy are chosen.

And they are difficult to put right. A second procedure is sometimes possible, but it depends on what remains in the donor area. Our feature on the failed hair transplant shows what these situations look like and what can still be done.

What lowers the risk before the operation even begins

Three levers, in order of importance.

The indication first. A transplant is the most durable treatment for androgenetic alopecia, but it does not suit every kind of hair loss, nor every patient. A proper assessment rules out the situations in which it has no place: our page on the contraindications to a hair transplant does that sorting.

The team next. The number of grafts announced, the identity of the person who opens the incisions, the hygiene protocol, the follow-up at one year: those are the questions that genuinely protect you.

Your own behaviour last. Stopping smoking around the procedure, keeping to the washes, not scratching, reporting anything that falls outside the calendar. That is enough to head off very nearly every avoidable problem.

A well-indicated, well-conducted transplant ends in one unpleasant week and then months of waiting. Nothing more. That is exactly what we set out to achieve for every patient who comes to us for a hair transplant Turkey, and it begins with a consultation that says no when no is what has to be said.

Sources

Garg, A. K., & Garg, S. (2021). Complications of hair transplant procedures: Causes and management. Indian Journal of Plastic Surgery, 54(4), 477-482. https://doi.org/10.1055/s-0041-1739255

Zhou, Y., Zhang, J., Yi, Y., & Xie, X. (2023). Characterization and risk factors of folliculitis after hair transplantation: A multicenter retrospective study. Plastic and Reconstructive Surgery, 154(6), 1115e-1122e. https://doi.org/10.1097/PRS.0000000000011175

Zhang, J., Zhao, Y., Zhang, J., & Zhou, Y. (2024). Risk factors and hazards of recipient-area perifollicular erythema after hair transplantation: A multicenter retrospective cohort study. Aesthetic Plastic Surgery, 48(15), 2771-2777. https://doi.org/10.1007/s00266-024-04166-z

Bunagan, K., Pathomvanich, D., & Laorwong, K. (2010). Recipient area folliculitis after follicular-unit transplantation: Characterization of clinical features and analysis of associated factors. Dermatologic Surgery, 36(7), 1161-1165. https://doi.org/10.1111/j.1524-4725.2010.01601.x