Last updated: October 31, 2026 · Written by Juan · Researched using a 2026 peer-reviewed review of FUE complications
This article is educational only. It is not medical advice, and I am not a doctor. This article describes documented risks; it cannot assess your symptoms. If something feels wrong during recovery, contact your clinic or a doctor rather than comparing your case with a general article. See our Editorial Policy for how we research and update our articles.
Most of what happens after a hair transplant is uncomfortable but normal: swelling, scabbing and itching. The difficulty is that normal healing and an early complication can look alike to someone going through it for the first time. This guide separates the two, and explains which signs mean you should call your clinic.
The figures below come mainly from a 2026 review of complications after FUE in Frontiers in Medicine by Romera de Blas and colleagues. The authors point out that most figures come from varied retrospective studies and case reports, so true rates across all patients are uncertain. Treat them as rough guides, not precise odds.
Normal healing: expected, not a complication
- Swelling of the forehead, reported in about 40% to 50% of patients in the review. Swelling around the eyes is less common, at about 3% to 5%. It usually builds over the first few days and then settles.
- Scabs at the graft sites, which normally come away within about two weeks.
- Itching as the skin heals.
- Temporary numbness in the treated areas, which usually improves over weeks to months.
- Shedding of transplanted hairs in the first weeks, which is part of the normal cycle before regrowth.
- Light oozing or bleeding in the first day or two.
Our recovery timeline shows how this progresses week by week.
Common problems that are usually manageable
- Folliculitis (inflamed hair follicles, often like small pimples) is one of the more common issues, reported in about 12% of patients in one study cited by the review. Persistent or widespread inflammation should be checked, because it can delay regrowth.
- Shock loss, meaning temporary shedding of native hair near the transplanted area. Reported rates vary widely, from 0.15% to 15%. It usually grows back, but tell your surgeon if it is extensive.
- Cysts, firm small bumps that can become inflamed. The review links them, and folliculitis, to grafts placed too deep (“buried grafts”).
- Scarring in the donor area. FUE leaves small dot scars and FUT a linear scar. Our scars guide explains what affects how visible they are.
Rare but serious complications
These are uncommon, but they are the reason to know the warning signs.
Infection
The review puts infection below 1% in most studies. Signs include pustules or honey-colored crusts, pain that increases rather than eases, spreading redness or swelling, discharge, or tender swollen glands. The authors advise taking a culture before starting antibiotics, so let a doctor assess it rather than treating it yourself.
Necrosis
Necrosis means tissue in the recipient area dies because its blood supply is compromised. It is rare, and the review says its true incidence is unknown. Warning signs include skin that turns dark or purplish, black crusts, raw areas after the crusts come off, and thick crusts that persist well beyond about two weeks. Areas that keep bleeding may also be at risk. Risk is linked to how densely grafts are packed and to the patient’s own circulation; smoking is a known concern, as we cover in our guide to alcohol, smoking and exercise.
Overharvesting of the donor area
If too many grafts are taken from the back and sides, the donor area can look thin or “moth-eaten”. This is a matter of planning and surgeon judgment, and it is permanent. It is one reason to ask how many grafts a clinic plans to take and why; our second transplant guide explains why donor hair is finite.
Long-term numbness
Temporary numbness is normal. The review cites long-term numbness or tingling in about 2% of patients in one study. Numbness that has not improved after several months, or a burning sensation, is worth raising with a doctor.
What reduces the risk
- A surgeon who plans graft numbers and density for your scalp, rather than aiming for the highest count in one session. Our guide to choosing a clinic explains how to check who does what.
- A clinic with written infection-control and aftercare instructions.
- Telling the clinic your full medical history, including circulation problems, bleeding disorders, smoking and medication that affects bleeding or healing.
- Following the aftercare instructions on sleeping position, washing and activity, especially in the first two weeks.
When to call your clinic or a doctor
Contact your provider promptly if you notice any of the following:
- pain that gets worse after the first few days instead of better;
- spreading redness, warmth or swelling;
- fever;
- pus, honey-colored crusts or foul-smelling discharge;
- skin that turns dark, purple or black;
- an area that keeps bleeding or clearly is not healing like the rest;
- numbness or burning that has not improved after several months.
Frequently asked questions
Is swelling a sign that something is wrong? Not on its own. Forehead swelling is common in the first days. What matters is the direction: normal swelling peaks and then settles.
When do serious complications usually show up? Infection and necrosis typically appear in the first one to two weeks, which is why aftercare is strictest then.
Does a cheaper clinic mean more complications? Not automatically, but very low prices can reflect cut corners on staffing, sterile technique or planning. Check credentials and protocols rather than relying on price.
Can complications happen at a good clinic? Yes. Some depend partly on individual factors such as circulation and healing, which is another reason to disclose your full medical history.
This article is for information only and is not medical advice. Contact your clinic or a doctor about any symptom that worries you.
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