How a Hair Transplant Works, Step by Step

A hair transplant works by moving follicular units, small natural groups of one to four hairs, from the back and sides of your head into areas where hair has thinned. The follicles keep growing in their new place because they carry the traits of the donor area with them, a principle surgeons call donor dominance.

That is the whole idea. The rest is logistics, and the logistics matter, because a transplant is a long day of small, repeated decisions made by hand. This guide walks through it in the order it happens. For the wider picture, including candidacy and risks, start with our guide to what a hair transplant is and how it works.

Step one: the consultation

The consultation is where a surgeon decides whether you should have surgery at all. A good one begins with a diagnosis, not a graft count.

Expect questions about when your hair loss started, whether it runs in the family, your general health and any medicines you take. The surgeon will examine the thinning area and, just as importantly, the donor area: how dense it is, how wide the band of stable hair is, and whether it too shows signs of thinning. If anything suggests your loss has a different cause, such as a thyroid problem, low iron or an inflammatory scalp condition, the right next step is a GP or dermatologist rather than an operation.

This is also the moment to ask who will do the work. The International Society of Hair Restoration Surgery (ISHRS) urges patients to confirm that the doctor performs the surgery rather than delegating it to an unlicensed technician. Ask directly, and ask for the answer in writing.

Step two: planning and hairline design

Before any cut, the surgeon plans where the grafts will go and draws the new hairline on your forehead. The drawing is a medical judgement about the future as much as the present.

A hairline has to suit your face now and in twenty years, when the hair behind it may have thinned further. Designs that sit too low or too straight are among the problems the ISHRS lists in its guide to repairing earlier transplants. A conservative line that leaves donor hair in reserve is often the more careful plan, even if it is not the most dramatic one on day one.

The plan also sets the number of grafts. That depends on the area to be covered, the density your donor zone can spare, and whether future sessions are likely. Our guide on how many grafts you need explains why the answer is a range rather than a promise.

Step three: numbing the scalp

Most hair transplants are done under local anaesthetic, with you awake. The American Academy of Dermatology (AAD) says most patients remain awake throughout, with only the scalp numbed, and some also take a mild sedative.

The injections that numb the scalp are usually the most uncomfortable part of the procedure. Once they take effect, most people feel pressure and movement rather than pain. Numbing is topped up through the day as needed, which is part of why sessions are long.

Step four: harvesting the grafts

Grafts are harvested in one of two ways: follicular unit excision (FUE) or strip harvesting, known as FUT. Which one depends on your hair, your donor area and the surgeon's judgement.

With FUE, the surgeon removes units one by one using a tiny round punch; the ISHRS gives sizes of 0.7 to 1.2 mm. The donor area is usually shaved first. Each extraction leaves a small dot scar, spread out across the back and sides.

With FUT, the surgeon removes a thin strip of scalp and stitches or staples the wound closed. The strip is then divided under magnification into individual grafts. This leaves one linear scar, usually hidden under hair, and avoids shaving the donor area.

Our full comparison of FUE vs FUT vs DHI covers the trade-offs, including why the ISHRS says DHI is not a separate method.

Step five: keeping grafts alive

Harvested grafts spend some time outside the body before they are placed, and how they are handled in that window matters. Grafts are small pieces of living tissue, and drying or rough handling can damage them.

Teams sort grafts by the number of hairs in each unit and keep them in a holding solution until placement. Single-hair units are usually kept aside for the very front of the hairline, where a soft, irregular edge looks most natural, and larger units go behind them for density. You won't see much of this; it happens on a side table while you rest.

Step six: making the recipient sites

Next, small incisions are made in the thinning area to receive the grafts. This step decides much of how natural the result looks, because the angle and direction of each incision set the angle and direction of each hair.

Hair on the front and top of the scalp does not grow straight up; it lies at particular angles that change across the head, and the crown grows in a swirl. Matching those angles is skilled work. The ISHRS's Fight the FIGHT campaign lists "wrong hair direction" among the problems it sees after surgery by unlicensed technicians, and making scalp incisions is one of the steps it says technicians should not be performing.

Step seven: placing the grafts

Each graft is then placed into an incision, one at a time. Placement is done with fine forceps or with an implanter, a pen-like tool that holds the graft in a channel and pushes it into the skin.

Some implanters place grafts into incisions made beforehand; sharp versions make the incision and implant in one movement. Clinics sometimes market implanter placement as "DHI". It is a tool choice within the procedure, not a different kind of transplant.

The AAD says the whole day takes between four and eight hours. Larger sessions run long, with breaks for food and rest.

Step eight: the first days after

Once the grafts are in, the surgeon checks the areas, may apply a dressing, and gives you aftercare instructions to follow exactly. The first days are about protecting the grafts while the tiny wounds seal.

The American Society of Plastic Surgeons (ASPS) says bandages, if used, usually come off a day later, and that the hair can be washed gently within two days. Expect some swelling, soreness and tightness, which your clinic will tell you how to manage. Stitches from strip harvesting come out in a week to 10 days, according to the ASPS, while the ISHRS says the small scabs of FUE usually clear in about one to two weeks.

The months that follow are the slow part, and they include a shedding stage that alarms many people. Our hair transplant timeline, month by month explains what each stage looks like.

Where things go wrong

Most of what can go wrong traces back to one of the steps above: a hairline drawn for today rather than for later, too many grafts taken from the donor area, incisions at the wrong angle, or rough handling of grafts. The common thread is judgement and training.

That is why the question "who does what?" belongs at the top of any consultation. The ISHRS's 2025 practice census found that repairs of earlier black-market transplants made up 10% of members' cases on average, and 59.4% of members reported black-market clinics in their city. For the full picture of complications, see hair transplant side effects and when to call the clinic.