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Hair Transplant

How FUE and FUT hair transplants work, why diagnosis comes first, donor limits, shock loss, recovery, results at about a year, and the evidence on risks.

By Vireon Medical Editorial TeamFirst published Evidence checked through

Short answer

A hair transplant is surgery that moves hair follicles from a permanent donor zone, usually the back and sides of the scalp, into thinning or bald areas.5 It may help selected people with pattern hair loss, but it redistributes existing hair rather than creating new hair, and the donor supply is finite.6 Hereditary hair loss continues after surgery, so many people also need ongoing medical treatment.3 Because several conditions cause hair loss and some are unsuitable for surgery, the cause needs to be diagnosed before a transplant is discussed.4

Decision snapshot

QuestionTypical answer
Main useStable, diagnosed pattern hair loss with an adequate donor area
TechniquesFUE (follicular unit excision) or FUT (follicular unit transplantation, the strip method); DHI describes a way of implanting grafts
AnaesthesiaLocal anaesthesia, sometimes with conscious sedation
Visible growthTransplanted hairs usually shed, then regrow from around three months
Final resultOften a year or more
SessionsOne or more, depending on the extent of loss and donor supply
Key limitationDoes not stop ongoing hereditary loss; donor hair cannot be replaced once used
Summary only. Suitability depends on diagnosis, pattern of loss and donor assessment.
On this page

How a hair transplant works

Hair on the back and sides of the scalp is usually less affected by pattern hair loss. A transplant harvests follicular units, the small natural groups in which hair grows, from this permanent donor area and places them where hair has thinned.5 The transplanted follicles keep growing hair in their new position.

There are two ways of harvesting. In FUT, a strip of hair-bearing scalp is removed from the back of the head and divided into individual grafts, and the wound is closed with stitches or staples. This leaves a linear scar, usually hidden by surrounding hair.7 In FUE, individual follicular units are cut out with small punches, typically 0.7 to 1.2 mm across. FUE avoids a linear scar but is not scarless: it leaves many tiny scars that are usually not visible.68

Whichever harvesting method is used, the grafts are then placed into small recipient sites. Some teams load grafts into pen-like implanters rather than using fine forceps; this is what DHI (direct hair implantation) usually refers to.11 It is a placement method, not a separate type of harvesting. More detail is on the FUE and DHI pages.

The hair growth cycle, and donor and thinning areas in male pattern hair loss Left: a cycle diagram with three phases joined by clockwise arrows. Anagen, the growth phase, leads to catagen, a short phase in which the follicle breaks down, which leads to telogen, the resting phase, and back to anagen. A marker on the arrow from telogen back to anagen is labelled exogen: the old hair is shed as the next growth phase begins. Right: an outline of the scalp seen from above, with the front at the top. In male pattern hair loss, thinning typically affects the front and temples and the crown, shaded in bronze. A green band around the back and sides marks the donor area that hair is usually taken from in a hair transplant. Simplified diagram, not to scale. Anagen growth Catagen breakdown Telogen resting Exogen old hair sheds as new growth begins Male pattern hair loss scalp seen from above Front Thinning: front and crown Donor area: back and sides
Each follicle cycles through growth (anagen), breakdown (catagen) and rest (telogen); the old hair is shed (exogen) as new growth starts. In male pattern hair loss, thinning typically affects the front, temples and crown, while transplant hair is usually taken from the back and sides. Simplified diagram, not to scale.

What may be causing the hair loss

The most common cause is hereditary pattern hair loss (androgenetic alopecia), which typically causes a receding hairline or thinning at the crown.2 It is not the only cause, and several others look similar at first.

  • Shedding after a trigger. Illness, major stress, weight loss, childbirth or iron deficiency can cause temporary thinning, often appearing months later.12
  • Thyroid and other medical conditions, including alopecia areata, an immune-related cause of patchy loss.2
  • Medicines, including some used for cancer, arthritis, depression, heart disease, gout and high blood pressure.2
  • Scalp infection such as ringworm, and hair-pulling (trichotillomania).2
  • Traction alopecia from tight hairstyles, which can become permanent if scarring develops.2

A clinician will usually take a history, examine the scalp and nails, and may perform a pull test, blood tests, light microscopy of the hair or a scalp biopsy.34 The International Society of Hair Restoration Surgery (ISHRS) warns that skipping this step risks misdiagnosis and missed systemic disease.12 Background on the most common cause is on our male pattern hair loss page.

What it may change

  • Coverage in a receding hairline, temples or crown, within the limits of donor supply.
  • The appearance of density in a defined area, sometimes over more than one session.8

What it will not change

  • It does not stop hereditary hair loss in untreated areas, which progresses despite surgery.3
  • It cannot increase the total number of hairs available. Donor hair, once removed, does not grow back.6
  • It does not treat the underlying cause of non-hereditary hair loss.

Who may be considered

The ISHRS describes surgery as an option for appropriately selected and diagnosed men and women.5 Cleveland Clinic notes that surgery is generally performed once hair loss has been stabilised with medical treatment.8 A clinician will also weigh the size of the thinning area against the density of the donor zone, because both determine what is achievable.

Who may not benefit or may face additional risk

  • People with a sparse donor area relative to the area of loss.
  • Many women with diffuse thinning; Cleveland Clinic notes women are rarely candidates, with exceptions such as traction alopecia or trauma.8
  • People who smoke or have diabetes, both listed as risk factors for tissue necrosis after FUE.9

When a responsible clinician may advise against it

  • The diagnosis is unclear, or the loss is from active shedding or an inflammatory scalp condition.
  • Loss is still progressing rapidly and has not been stabilised.8
  • Expectations exceed what the donor area can supply, including requests for very large graft numbers.9

Alternatives

OptionWhat it doesMain limitation
MinoxidilCan help early loss in men and women; cannot regrow a full head of hair14Takes at least six months; benefit stops when use stops3
FinasterideDaily tablet for male pattern loss4Not for women; works only while taken1
Low-level laser deviceApproved in the United States for hereditary loss3Small studies; long-term effects unclear3
Wigs and hairpiecesImmediate coverage without surgery1Ongoing upkeep
Medical treatment is often used alongside surgery rather than instead of it.

In men, a network meta-analysis of randomised trials found finasteride combined with minoxidil was the only combination significantly better than minoxidil alone, although most comparisons in that analysis rested on low-certainty evidence.10 See medical treatments for hair loss.

No treatment is a legitimate option

Pattern hair loss is not harmful to physical health. Choosing to leave it alone, keep hair short or use a hairpiece is a reasonable decision, and declining surgery keeps the donor area intact for the future.

Procedure, preparation and anaesthesia

Before surgery, the clinician will review medicines, supplements, alcohol, tobacco and allergies.8 The hairline and recipient area are planned, and the number of grafts is estimated from the donor assessment.

The operation is usually done as a day case under local anaesthesia, sometimes with conscious sedation.8 FUE usually requires shaving the donor area, while FUT does not, so the strip site is hidden afterwards.67 Harvesting is surgery: the ISHRS states the incisions and excisions should be performed by a licensed physician, not delegated to an unlicensed technician.513

Recovery and results timeline

WhenWhat commonly happens
First daysMost people feel well within a day or two; a pressure bandage may be worn briefly8
Days 2 to 7Forehead swelling peaks around days 2 to 3 and settles by days 5 to 79
1 to 2 weeksSmall scabs come away; FUT stitches are typically removed around day 1068
2 to 8 weeksTransplanted hairs shed; some existing hairs may also shed (shock loss)9
Around 3 monthsNew growth starts8
12 months or moreFinal result usually assessed; further sessions considered after this point69
Individual timelines vary.

Return to work, exercise and washing routines vary between surgeons, so written aftercare instructions matter.6 More detail is on the hair transplant recovery page.

How long results last

Follicles taken from the permanent donor area tend to keep growing after transplantation.5 The surrounding native hair does not share that protection. Hereditary loss continues, which can leave a transplanted zone isolated over time and may lead to more surgery.3

For this reason, medical treatment is often discussed alongside surgery. Minoxidil and finasteride only work while they are used.1

Pain and comfort

The scalp is numbed with local anaesthetic, and some surgeons also offer sedation for comfort; the anaesthetic injections themselves may be the most noticeable part.68 Afterwards, tightness, soreness and temporary numbness are common.8

FUT can cause more discomfort than FUE in some cases, because of the stitched donor wound.7 In one large series, about 2% of patients had longer-lasting numbness or tingling, usually resolving within 4 to 8 months.9 Pain relief after surgery is agreed with the surgical team.

Risks and complications

A 2026 review reported overall FUE complication rates of 1.2% to 4.7% in large clinical series, with most events mild and self-limiting.9

CategoryExamples
Expected temporary effectsSwelling of the forehead or around the eyes, scabbing, redness, itching, tightness, temporary numbness, shedding of transplanted hairs89
Recognised complicationsShock loss of native hair (reported in 0.15% to 15%), folliculitis (about 12% in one multicentre study), bleeding, poor graft growth, visible donor scarring, overharvesting of the donor area39
Rare serious complicationsInfection (below 1% in most studies), tissue necrosis, keloid scarring, arteriovenous fistula9
Frequencies come from case series and vary widely between settings.

Shock loss usually appears 2 to 8 weeks after surgery and regrows from around three months, but it can be distressing.69 Overharvesting is permanent: the ISHRS describes a damaged donor area as irreversible.6 Serious infections have mostly been reported after procedures in non-medical or poorly regulated settings.9

Seek prompt medical advice if

  • The skin around the donor or recipient area becomes red, hot, swollen or increasingly sore.
  • Pus, often green or yellow, comes from a wound, or a wound opens.
  • You feel generally unwell or have a fever.

These are general signs of wound infection; NHS guidance advises contacting a doctor straight away.14

How strong is the evidence?

ClaimVireon assessmentWhat supports itImportant limitation
Transplanted donor hair can grow in thinning areasModerateProfessional society guidance and academic centre information58Few controlled trials; outcomes depend heavily on selection and team
FUE avoids a linear scar; FUT leaves oneModerateISHRS technique guidance67FUE still scars; scar quality varies
Finasteride plus minoxidil outperforms minoxidil alone in menModerateNetwork meta-analysis of randomised trials10Indirect comparisons; small trials
Overall complication rates are lowLimitedNarrative review of clinical series9No pooled analysis; under-reporting likely
Shock loss frequencyUncertain incidenceReported range 0.15% to 15%9Inconsistent definitions
Implanter (DHI) placement gives better results than forcepsInsufficientSmall technique studies only11No robust comparisons of long-term outcomes
Vireon evidence labels: Strong, Moderate, Limited, Mixed, Insufficient, Uncertain incidence.

Most hair transplant evidence comes from case series, surgeon experience and society guidance rather than randomised trials. Published series rarely compare techniques head to head, and outcomes from experienced, regulated teams may not apply to other settings.

Technique distinctions and red flags

FUT can move many grafts in one session without shaving, and the ISHRS notes it avoids the risk of overharvesting the donor area, at the cost of a linear scar.7 FUE avoids that scar but needs careful limits; many authors suggest harvesting no more than 10% to 20% of donor follicular units per session.9 Branded names, including DHI, describe variations in tools rather than a different biology.

The ISHRS has warned about black-market clinics where unlicensed technicians perform the surgery, sometimes after a brief appearance by a doctor.1213 Its listed red flags include:13

  • no clearly identified surgeon, or a sales-driven consultation;
  • promises of huge or “unlimited” grafts;
  • marketing built around proprietary-sounding technology;
  • packages that emphasise travel over medical care, or reliance on reviews and social media alone.

See how to verify a doctor’s credentials.

Cost drivers and what a quote should include

Cost depends mainly on the planned number of grafts, the technique, the time the surgeon personally spends on the case, and whether more than one session is likely. A clear written quote would normally state:

  • the diagnosis and how it was made;
  • the named surgeon and who performs each step, including incisions and graft harvesting;
  • the estimated graft number and the reasoning behind it;
  • anaesthesia, medicines, dressings and follow-up reviews;
  • what happens if growth is poor or a complication needs treatment.

Our guide to reading a treatment quote covers this in more depth.

If you are travelling for treatment

  • Diagnosis and donor assessment need an in-person scalp examination; photographs alone are a limited substitute.
  • Allow time for the first check and, after FUT, stitch removal around day 10, or arrange it at home in advance.8
  • Ask who you contact if swelling, infection or poor growth appears after you return, and confirm records will be shared with your own doctor.
  • The result is judged at around a year, long after you have left, so plan how follow-up will happen.

Questions worth asking a clinician

  • What is causing my hair loss, and how was that confirmed?
  • Who will make the incisions and harvest the grafts, and what are their qualifications?12
  • How much donor hair do I have, and how much would this session use?
  • Should I use medical treatment before or after surgery?
  • How likely am I to need another session?

Frequently asked questions

Does a hair transplant hurt?

The procedure itself is done with the scalp numbed, although the anaesthetic injections may be uncomfortable.8 Soreness and tightness afterwards are common, and FUT may be more uncomfortable than FUE.7

How long until I look normal?

Scabs usually clear within one to two weeks and swelling within about a week.69 A shaved donor area after FUE takes longer to blend in.

When can I work, exercise and fly?

Advice differs between surgeons, so follow your team’s written instructions.6 Many people feel well within a day or two, although swelling can affect the forehead and eyelids.8 Flying and long journeys are worth discussing with the surgeon before arranging travel.

Why is my hair falling out after the transplant?

Shedding of transplanted hairs in the first weeks is expected, and some native hair may shed too (shock loss).9 Regrowth usually starts from around three months.8

Will I need more than one session?

Possibly; several sessions spaced months apart may be needed for adequate density, and continuing hereditary loss can create new areas to treat.38

Do I still need hair loss medicine afterwards?

Often, yes: surgery does not stop loss in untreated areas, and medicine is a way to slow it.3 Whether it suits you is an individual decision with a prescriber.

Bottom line

A transplant relocates a limited supply of hair; it does not cure hereditary loss. The decisions that matter most are a confirmed diagnosis, a realistic plan for the donor area over a lifetime, and certainty about who performs the surgery.

Sources

  1. NHS. Hair loss. NHS website; 2024. https://www.nhs.uk/conditions/hair-loss/treatment/ Accessed 5 November 2026.
  2. Mayo Clinic Staff. Hair loss: symptoms and causes. Mayo Clinic; n.d. https://www.mayoclinic.org/diseases-conditions/hair-loss/symptoms-causes/syc-20372926 Accessed 5 November 2026.
  3. Mayo Clinic Staff. Hair loss: diagnosis and treatment. Mayo Clinic; 2026. https://www.mayoclinic.org/diseases-conditions/hair-loss/diagnosis-treatment/drc-20372932 Accessed 5 November 2026.
  4. American Academy of Dermatology. Hair loss: diagnosis and treatment. AAD; n.d. https://www.aad.org/public/diseases/hair-loss/treatment/diagnosis-treat Accessed 5 November 2026.
  5. International Society of Hair Restoration Surgery. A guide to hair transplant surgery. ISHRS; 2018, updated 2024. https://ishrs.org/patients/treatments-for-hair-loss/surgical-treatments/ Accessed 5 November 2026.
  6. International Society of Hair Restoration Surgery. Guide to FUE hair transplant: benefits, process and recovery. ISHRS; 2024. https://ishrs.org/fue-what-is-it/ Accessed 5 November 2026.
  7. International Society of Hair Restoration Surgery. Guide to FUT hair transplant: benefits, procedure and recovery. ISHRS; 2024. https://ishrs.org/fut/ Accessed 5 November 2026.
  8. Cleveland Clinic. Hair replacement surgery. Cleveland Clinic; n.d. https://my.clevelandclinic.org/cosmetic-plastic-surgery/procedures/hair-loss Accessed 5 November 2026.
  9. Romera de Blas C, Vega Díez D, Ricart Vayá JM, Gómez Zubiaur A. Complications in follicular unit excision hair transplantation: current evidence and practical approaches. Frontiers in Medicine; 2026;13. https://doi.org/10.3389/fmed.2026.1750989
  10. Xia Y, Chen H, Chen Y, Chen Z. Relative efficacy of minoxidil in combination with other treatments for androgenic alopecia: a network meta-analysis based on randomized controlled trials. Frontiers in Medicine; 2025;12. https://doi.org/10.3389/fmed.2025.1638496
  11. Agarwal S, Bhaskaran R, Krishnan M, Saketheraman P. Use of 45-degree implanter angulation with bevel-to-skin orientation to enhance follicular entry. Aesthetic Medicine; 2026;12(2). https://doi.org/10.57662/am.2026.18733
  12. International Society of Hair Restoration Surgery. Buyer beware: medical tourism for hair transplants can have costly consequences. ISHRS; 2016. https://www.ishrs.org/press-release/buyer-beware-medical-tourism-hair-transplants-can-have-costly-consequences Accessed 5 November 2026.
  13. International Society of Hair Restoration Surgery. Hair transplant black market red flags. ISHRS; 2023. https://fightthefight.ishrs.org/hair-transplant-black-market-red-flags/ Accessed 5 November 2026.
  14. Guy’s and St Thomas’ NHS Foundation Trust. Surgical wounds and preventing infections. GSTT; 2025. https://guysandstthomas.nhs.uk/health-information/surgical-wounds-and-preventing-infections Accessed 5 November 2026.

Article history

  • — First published.