The fine print, first
It goes at the beginning and not at the end, because it is what decides whether you should have this done:
None of the three is a flaw in the technique. They are the nature of the procedure. A patient told beforehand ends up satisfied; a patient told afterwards feels deceived — with exactly the same result.
- It has to be trimmed. Always. The transplanted follicle keeps the memory of its origin: if it came from the scalp, it grows like scalp hair. Every two or three weeks, for life. There is no way around it.
- Not every grafted hair takes. A proportion is lost — this is expected and is built into the planning. In some cases a refinement session is scheduled, and that is said at the assessment, not sprung as a surprise.
- The result takes time. Grafted hair sheds at 2–4 weeks (the follicle’s resting phase: it is normal and it frightens everyone) and starts coming through around month 3–4. The result is judged at 9–12 months. Anyone who looks at two months will think it failed.
When a brow is NOT grafted
There are causes of brow loss in which grafting means throwing follicles away — and follicles are a finite resource: what comes out of the donor area never grows back there.
So before operating, why the brow was lost is investigated. If there is an active disease behind it, the disease is treated. Grafting onto an active process is paying to lose follicles.
- Alopecia areata — autoimmune, and it can affect the brow. On active areata the graft is lost. See alopecia areata.
- Active cicatricial alopecia — the follicle is destroyed and replaced by fibrosis. A graft onto active scarring does not take.
- Uncontrolled thyroid disease — loss of the outer third of the brow is a classic sign. With the underlying problem untreated, it falls out again. Investigated in the clinic’s laboratory.
- Active trichotillomania — if the pulling continues, the grafted hair gets pulled too. What lies underneath is treated first.
- Chronic aggressive plucking — this one IS grafted, and with very good results: it is among the most rewarding indications.
Why a brow is harder than a scalp
Technically, grafting a brow is more demanding than grafting a hairline, and anyone who says otherwise has done neither.
On the scalp, hair emerges with some freedom and can be combed. In a brow, each hair must emerge at an almost flat angle — practically lying on the skin — and in a direction that changes along the brow: at the head of the brow the hair points upward, through the body it flattens toward horizontal, and at the tail it points outward and down. One degree too many and the hair stands up; one wrong direction and the brow looks like a brush.
It is also grafted one follicle at a time, not in groups of two or three as on the scalp: a double follicular unit in a brow produces two hairs emerging from one point, and that does not exist in a natural brow. It shows, and it shows badly.
So this procedure is not a question of machinery. It is a question of surgical judgement and hand: the brow is designed with the patient seated, awake and holding a mirror, before anything is touched — because a badly designed brow is a permanent mistake.
How it is done
It is performed under local anaesthesia, as a day case. It usually takes between two and four hours, depending on the number of follicles.
Follicles are extracted one by one by FUE from the donor area — usually the occipital scalp, whose hair resists androgenetic loss — and implanted individually into the brow, at the designed angle and direction. There are no stitches in the brow and no scalpel.
The number of follicles depends on what is missing: a brow needing densification is not the same as a brow that is essentially absent. It is defined at the consultation, with the design done. The guide how many grafts do I need? explains how this is calculated on the scalp, and the logic is the same.
If there is scalp hair loss as well, it is worth measuring first: see HairMetrix hair analysis. The donor area is a shared, finite resource — what is spent on a brow is not available for a crown.
All surgery carries risk and requires a prior medical assessment. Results may vary according to each patient, their anatomy and their individual healing process.
Transplant or microblading: the honest comparison
They are not competitors: they are different things, and there are patients for each.
Microblading is pigment in the skin. It does not grow, needs no trimming, is reversible over time (it fades) and needs retouching every one or two years. It is an excellent option for someone who wants neither surgery nor daily maintenance, and for anyone with a contraindication to grafting.
A transplant is your own hair — living, permanent, with real volume and texture — and trimming for life. On a brow seen close up, real hair has no rival.
The right answer depends on which bothers you more: maintenance every fortnight, or a retouch every couple of years. That is decided at the consultation, and nobody is pushed into theatre here who is better off with pigment.
Cost is defined at the consultation, according to the number of follicles. See the price list. See also beard and moustache transplant and hair transplant.
See the full guide: Post-surgical recovery and care.
Dr. Arístides Arellano is a plastic surgeon holding a specialty licence: he practises under a Mexican medical licence (D.G.P. 1125959) and a specialty licence in Plastic & Reconstructive Surgery (0002008), both issued by the Directorate General of Professions (DGP), which reissued his certificate of professional standing in 2025. His career began before Mexico’s present-day specialty-board system existed: he belongs to the founding generation of plastic surgery in Puebla, the second generation of a surgical tradition started in 1971 by Dr. Francisco Arellano Ocampo. Trust is verified, not promised: both licences are public and anyone can look them up in the DGP’s National Registry of Professionals.
Documented training in hair restoration and facial aesthetics
The eyebrow is the hardest transplant: every follicle sits at a different angle and the error is visible from a metre away. Dr. Arístides Arellano is fully licensed — professional and specialty cédula — with documented training in the two disciplines it demands, hair and facial:
- Member — International Society of Hair Restoration Surgery (ISHRS) — 1996
- Article: Surgical treatment of baldness — 20 years of experience — Medicina Cutánea I.L.A., Vol. XIV, 1986 · Chajchir, Benzaquen, Arellano
- Course: facial aesthetics — XXVI Congresso Brasileiro de Cirurgia Plástica · Blumenau, 1989
- Speaker — Argentine Hair Micro-transplant Association course — Tema: evolución de la cirugía de las alopecias definitivas · Buenos Aires, 27 de abril de 2020
Trust is verified, not promised. All 210 scanned documents —degree, licences, diplomas, publications and certificates, from 1977 to 2025— are open in Dr. Arístides Arellano’s credential archive, alongside an explanation of the difference between a specialty licence and a board certification.
Recovery · step by step
- Day 0Day-case procedure under local anaesthesia, 2 to 4 hours. The brow is designed beforehand, with the patient seated and holding a mirror. You walk out.
- Days 1–7Swelling and small crusts around each grafted follicle. This is the visible phase. No scratching, no rubbing, no make-up on the area.
- Weeks 2–4The grafted hair FALLS OUT. It is normal, expected, and the phase that frightens everyone. The follicle is alive under the skin: what sheds is the shaft, not the root.
- Months 3–4New hair starts coming through, fine at first. Calm is restored here.
- Months 6–9The brow gains density and the hair gains thickness. Periodic trimming begins — and it is now permanent.
- Months 9–12Final result. This is when it is judged, not before. If a refinement session was planned, it happens here. Results may vary.
Frequently asked questions
Do I really have to trim my eyebrows forever?
Yes, and it is the most important piece of fine print in this procedure. The transplanted follicle keeps the memory of its origin: if it came from the scalp, it grows like scalp hair. It will need trimming every two or three weeks, for life. No technique avoids it. If that sounds intolerable, microblading is the better option for you, and we will say so.
Which is better, a transplant or microblading?
They are not competitors. Microblading is pigment: it does not grow, needs no trimming, fades, and needs retouching every one or two years. A transplant is your own hair: permanent, with real volume and texture, and trimming for life. The right question is which maintenance you tolerate better. Nobody is pushed into theatre here who is better off with pigment.
My grafted hair fell out at three weeks. Did it fail?
No. That is the follicle’s resting phase and it happens to virtually every patient. What sheds is the shaft; the root is alive under the skin. New hair starts coming through around month 3 or 4, and the result is judged between month 9 and 12.
Why am I asked to have my thyroid checked before an eyebrow graft?
Because loss of the outer third of the brow is a classic sign of thyroid disease. If the underlying cause is not controlled, the brow falls out again — including the grafted hair. Checking the thyroid first is the difference between solving the problem and paying to lose follicles. It is investigated in the clinic’s own laboratory.
Can a brow be grafted onto alopecia areata?
Not while it is active. Alopecia areata is autoimmune and attacks the follicle: grafts placed on an active patch are lost. The disease is treated first, and only if it stabilises is grafting reconsidered. It is exactly the kind of case where the right answer costs a surgery — and gets given anyway.
Does it leave a scar?
In the brow there are no stitches and no scalpel: follicles are implanted one by one. In the donor area, FUE extraction leaves pinpoint marks that are hidden by the surrounding hair. Results may vary from person to person.
Every case is different. Discuss yours in a personal consultation.
Book a consultation on WhatsAppEvery figure published on this site is approximate and is not a quote. Any procedure or treatment first requires a private assessment consultation with Dr. Arístides Arellano —$800 MXN, charged separately— and it is at that consultation that the definitive cost of your case is determined.
Educational content; it does not replace a medical consultation. Results may vary from person to person.