Infection After a Hair Transplant: Signs, Rates and What to Do

Six weeks after a hair transplant in Turkey, a patient living in Sydney asked r/HairTransplants about a bump on the transplanted area that had been there "for more than 11 days and no pus discharge". Their family doctor's antibiotics had brought "no improvement", and the clinic abroad was "not very helpful" (u/Personal_Method_190, December 2024).

Is this normal, and who do I ask? That's the question this part of our hair transplant guide answers. A true infection after a hair transplant is uncommon: most published FUE series put it below 1%, and every figure that disagrees is on this page with its source.

Most redness, scabs and spots are normal healing or folliculitis. A painful, hot, spreading or pus-filled area is the exception, and it needs a call to your clinic and a doctor the same day.

When to Get Help, by Urgency

The three rows below come from a Bangkok hospital's own call list and the NHS, the UK's National Health Service. Match your symptoms to a row, starting at the top.

A fever means 38C or above, which the NHS fever page puts as "A high temperature is usually considered to be 38C or above." The bottom row exists because untreated cellulitis can reach the blood, muscles and bones.

If you aren't sure which row you're in, contact your clinic and see a doctor.

What Normal Healing Looks Like, Day by Day

The windows below are from a 2026 review of FUE complications in Frontiers in Medicine by Romera de Blas and colleagues, with a Thai clinic's own description where it adds something.

Swelling. The review's table reads "Onset day 1-2, peaks at days 2-3, resolves by 5-7 days." Forehead swelling shows up in "nearly half of patients", and swelling around the eyes in about 3% to 5%.

HARU Clinic in Nakhon Ratchasima describes the same curve (our translation from the Thai): the peak is days 3 to 4, when the saline used in surgery drains toward the eye sockets and some people's eyes swell shut, then on days 5 to 7 it moves down to the cheeks and jaw.

HairTran's Thai page adds that the skin may look slightly pink and there's no severe pain with it (our translation).

Bruising. The review says its "purple-yellow discoloration can persist for up to 10-15 days", and that it "may be visually concerning for patients".

Crusts. They appear within 2 to 3 days and clear by day 7 to 10 with normal care, and Bangkok Hair Clinic's FAQ gives a wider window of 7 to 14 days. The review says "Persistent crusts beyond 2 weeks should therefore be evaluated, as they may indicate delayed healing".

Itching. The review's table has it as "Typically appears days 3-7, lasting days to weeks." An intense or persistent itch is different: the review says folliculitis, contact dermatitis or a reaction to antiseptics or hair products "should be ruled out".

Redness. Pink skin is normal early on. Redness around the grafts that's still there past 4 weeks "should be assessed for folliculitis, infection, or irritant/contact dermatitis", the review says.

The full week-by-week picture is in our recovery timeline. Side by side, here's what sits inside the normal windows and what's worth a call:

Signs of a Real Infection

The review lists the signs doctors look for: "pustules or honey-colored crusts, increasing pain, swelling, erythema, purulent drainage, and tenderness or enlargement of regional lymph nodes". Erythema is redness, purulent drainage is pus, and regional lymph nodes are the glands near the area.

A general surgical-wound page from Guy's and St Thomas' NHS trust puts it in plainer words: the skin around the wound "is red or sore, or feels hot and swollen", liquid "(often green or yellow pus)" comes out of it, the wound opens, or "You feel generally unwell or have a temperature (fever)."

On timing, the same page says "A surgical wound infection can happen at any time from 2 to 3 days after surgery until the wound has healed." For hair transplants, the review's table puts the onset of infection and folliculitis in the "First 1-4 weeks."

A 2018 clinician review by Kerure and Patwardhan notes that "Localized infections can occur in both recipient and donor areas." It adds that recipient-site infections "often present with papulo-pustules localized to the affected area", small bumps with pus, and that an area showing "fluctuance, erythema, and tenderness", a soft, red, tender lump, suggests an abscess.

Pain, heat, pus, fever or spreading redness: contact your clinic and see a doctor the same day.

How Common Is Infection After a Hair Transplant?

Six figures, from five studies and one clinic, and they don't agree. We haven't averaged them, because they measure different things in different patients, and the table says what each one counted.

Why they disagree is in the sources' own words: the 2026 review's figures are "derived from heterogeneous sources, including retrospective series, case-based studies, and systematic reviews", and the Sturm review's reading was "limited by heterogeneity in definitions and reporting".

Folliculitis is a separate line, not part of these rates. In a 1,317-patient study across four medical centers (Zhou 2024, Plastic and Reconstructive Surgery), "The overall incidence of postoperative folliculitis was 12.11%", every site counted.

None of the Thai clinics whose pages we read publishes an audited infection rate, and we found none for Thailand in the medical literature. Bangkok Hair Clinic's figure above is what the clinic publishes; we compare what clinics put on their own pages and haven't visited or audited any of them.

Infection, Folliculitis, Pimples and Ingrown Hairs

"Went through my shedding phase. Noticed this red bump this morning while I was washing my hair. Slight pain if I touch it. Is this a pimple, ingrown hair, or folliculitis?" That was u/EatMyGOOGLShorts on r/HairTransplants in March 2025, who added: "I also have a pack of azithromycin for emergency. Should I start taking these?"

Folliculitis is a likely candidate for the first question, and only a doctor can answer the second. The review calls it "one of the most frequently reported postoperative complications following FUE".

The American Academy of Dermatology calls it "a common skin infection that develops in the hair follicles" on its general folliculitis page, which isn't about hair loss or transplants: "It usually looks like a sudden acne breakout. Each spot may have a red ring around it, which is a sign of the infection."

There are two kinds, and they look alike. Infectious folliculitis is "usually caused by Staphylococcus aureus" and "typically appears early", while sterile folliculitis "tends to develop later in the postoperative period" and shows inflammation around the follicle "without detectable microbial growth", the review says. Staph aureus is a bacterium the AAD says "is found on our skin".

Then there's the ingrown-hair version. The review says "Pseudofolliculitis usually emerges around week 10, coinciding with early graft growth", so a crop of spots when the new hairs start pushing through is a known pattern.

Telling the three apart is a doctor's job, because "The infected hair follicles can look like another skin condition, such as acne", as the AAD puts it.

The AAD also says "Some people need medication, such as an antibiotic, to clear the folliculitis", and others don't, and for an infection the review wants "bacterial cultures with sensitivity testing obtained before starting antibiotic therapy". So the pack of azithromycin stays in the drawer until a doctor has looked.

Most cases clear without lasting effects. The review's caution is that "extensive or recurrent folliculitis may delay hair regrowth and negatively affect graft survival", which is the reason to get a persistent crop looked at rather than waiting it out.

What Causes an Infection and Who Is More Likely to Get One

The review names the predisposing factors: "inadequate scalp hygiene, excessive crust formation, and preexisting medical risk factors such as diabetes or immunosuppression". Kerure's review adds the surgical side, "nonadherence to aseptic norms of surgery or lowered patient resistance", and says post-op washing and wound-care instructions need explaining in detail "because failure to follow these may cause infection".

Kerure adds one more: "A high-tension closure at the donor site leading to circulatory compromise and pronounced crust formation can increase the risk of infection." We read that as a point about strip (FUT) surgery, where the donor wound is closed.

The folliculitis study is the best data on who gets the spots. Across 1,317 patients, Zhou and colleagues found folliculitis more likely after surgery in summer, with 4,000 or more grafts, at a transplant density above 45 grafts per square centimeter, and when the first wash came more than 3 days after surgery. Those are findings about folliculitis risk, not a rulebook for infection.

How Serious Can It Get?

Most cases are mild, but there are exceptions. The review's line on them: "Severe infections, occasionally leading to localized tissue necrosis, are uncommon but may jeopardize graft survival and aesthetic outcomes", and "Early and appropriate therapy prevents graft compromise and promotes rapid recovery." Necrosis is skin tissue dying.

The worst outcomes in the literature are single case reports, and Kerure's review notes that "Septicemia has also been reported after hair transplant."

A 2026 report in the Journal of Surgical Case Reports (Al-Mamoori 2026) describes a scalp where "Dusky discoloration appeared on postoperative day two and progressed to extensive necrosis with yellowish crusting by day ten", with a Pseudomonas infection on top. That patient "had a history of heavy smoking and underwent a prolonged nine-hour procedure."

Proportion matters here. The Liu scoping review's summary is that serious complications of hair restoration surgery are rare when experienced hands do the work. The rest of what can go wrong, infection aside, is on our risks page.

Rare Infections That Don't Answer the First Antibiotic

A small group of infections won't respond to the usual antibiotics, and the published cases below both started weeks after surgery. The review puts it in one line: "Opportunistic infections caused by nontuberculous Mycobacterium spp. or Mucor spp. have been rarely reported, mostly after procedures performed in non-medical or poorly regulated settings".

The clearest case is in the Canadian Medical Association Journal (Chow 2023). "A 53-year-old previously healthy man presented with painful, red nodules on his anterior scalp 3 weeks after a hair transplantation in Panama." He'd had "about 6000 single hair follicles manually inserted" in an 8-hour DHI procedure, and "He continued to have spontaneous purulent drainage despite 7 days of antimicrobial therapy".

The organism took five weeks to grow in the lab. "After 5 weeks of incubation, Mycobacterium abscessus (subspecies massiliense) was isolated from the deep-tissue specimen", and after treatment "his nodules and abscesses were resolved completely at the end of therapy".

The authors' point is that M. abscessus should be considered when a postoperative infection isn't responding to standard antibiotics, and that "Microbiological specimens should be obtained to determine the organism and susceptibilities to antibiotics." Such infections are "often presenting weeks to months after the surgical procedure", and "Nontuberculous mycobacteria are difficult to identify on Gram stains and routine cultures."

A 2016 case in Clinical and Experimental Dermatology (Eustace 2016) has the same shape: "A 28-year-old man presented with a 10-day history of scalp nodules." who "had undergone hair transplantation 2 months previously." The authors conclude that "A high index of suspicion is therefore needed in patients who present with cutaneous infections after cosmetic dermatological procedures, including hair transplantation."

The cases we found in the medical literature were reported from other countries, and none names Thailand. The lesson travels: an infection that starts weeks after surgery and shrugs off the first antibiotic needs a culture.

Tell any doctor you see that you had surgery abroad, where and when, and ask whether a culture has been taken if the first antibiotic hasn't changed anything.

How an Infection Is Treated

The order of treatment in the review is culture first, then antibiotics, then adjust. Superficial infections "usually respond to topical antibiotics such as mupirocin or clindamycin", while "more extensive or diffuse infections with surrounding erythema, edema, or tenderness require systemic broad-spectrum antibiotics". Treatment starts promptly and is changed once the culture result comes back.

An abscess is drained by a doctor. The review's line on inflamed cysts is "incision and drainage, along with topical or systemic antibiotics when infection is present", and the CMAJ authors say that for M. abscessus "Surgical drainage and débridement should be used in combination with antibiotics."

Nobody drains anything at home. When one commenter suggested poking holes in a bump with a needle, a poster writing as a clinician replied "Please don't do this, we just saw a recent case of atypical mycobacterial infection causing scalp abscesses on this message board."

For a skin infection in general, the NHS standard is a course of antibiotic tablets, "usually for a week" for mild cellulitis, taken to the end "even when you feel better", and a call back to the doctor if you don't start to feel better 2 to 3 days after starting them.

One Thai clinic says the same about reaching for your own medicine. HairTran's Thai FAQ, asked whether a patient can take something for swelling that won't go down, answers (our translation) that it doesn't recommend buying medicine to take yourself: contact the clinic so the doctor can assess it and prescribe.

If It Starts After You've Flown Home From Thailand

Back to the Sydney patient. Their family doctor had prescribed oral antibiotics and "tried taking a sample of the infection by squeezing it but no pus came out", the clinic in Turkey told them to "keep applying Fucidin ointment till it goes away", and they asked the forum "Do you think a derm would be the best person to see?"

A commenter writing as a clinician had already suggested: "I would see a local derm or someone that can drain that and take a culture." The patient's reply shows the calendar problem: "Unfortunately, it's a bad time of the year as most places are closed for Christmas holidays." (u/Personal_Method_190, December 2024)

Three months on, they reported an ultrasound "which showed that it was inflammation", and a lump that had "started to get smaller" but was "still not completely gone". No diagnosis was ever posted.

Check the booklet. Bangkok Hair Clinic says its team "provides thorough post-operative care instructions and booklets" (shaven FUE page, read 9 Oct 2026). Read yours again for the clinic's contact route and its own list of what to call about.

Send photos today. HairTran publishes a "dedicated online follow-up system for international patients" through which "you can send photos of your transplanted area for our doctors to review", and says it can arrange a video call with your doctor (HairTran, read 9 Oct 2026). Its page doesn't say how fast it replies, so ask before you book, and don't wait for a reply if you have any sign from the urgency table.

See a doctor today. The NHS trust's wound page is blunt: "After you leave hospital, please contact your doctor or a GP straight away if you have a problem with your wound." A GP is a family doctor, and for the emergency signs it's the emergency number.

Tell the whole story. The date and place of the surgery, the technique, what the clinic gave you, and what you've already taken and whether it changed anything. The CMAJ case is why: the organism only showed up after a deep-tissue specimen was taken and grown for five weeks.

Medicine supply. One patient a week out from a transplant at a Bangkok clinic (named in the thread title) posted that the clinic's ointment, meant to be applied for 14 days, wouldn't last, and asked which one it was so they could "arrange to source this locally" (u/Background_Light_198, May 2026). The replies were "best to consult with your Dr" and a stranger's guess, so ask the clinic what to do if something runs out before you fly.

How to Lower the Risk

Wash early and gently, the way your clinic shows you. The review says "Early gentle cleansing with saline or mild shampoo within 24-72 h promotes faster re-epithelialization and reduces bacterial colonization", re-epithelialization being new skin closing over the wounds, and the Zhou study found folliculitis more likely when the first wash came more than 3 days after surgery.

One r/HairTransplants poster's view was that "My clinic and most of the clinics in Thailand do daily washes starting day 1." (u/-Firm-Tap-, December 2025), one patient's account rather than a survey of clinics. The routine itself is in our aftercare guide.

Leave the scabs alone. HairTran puts it as "Avoid picking or scratching scabs on the scalp to prevent dislodging grafts and causing infection.", Bangkok Hair Clinic's version is no rubbing, scrubbing or scratching of the transplanted area for 2 weeks, and the review ties the two together: "Delayed scab detachment may increase the risk of perifollicular inflammation or folliculitis, often related to inadequate washing or premature manipulation."

Tell the surgeon what raises your risk. The health conditions the review names are diabetes and immunosuppression, the 2026 necrosis case involved heavy smoking, and the folliculitis study found higher risk with 4,000 or more grafts and density above 45 grafts per square centimeter. Ask your surgeon how session size and density affect this for your case rather than applying those numbers yourself.

Antibiotics aren't a blanket prevention. "Although many surgeons routinely prescribe oral antibiotics", the review says, the evidence doesn't support giving them to everyone, and prophylaxis "should, in most cases, be reserved for patients at increased risk of surgical-site infection". Take what you were prescribed as prescribed ("Take oral medication as prescribed by our doctors" is Bangkok Hair Clinic's line), and treat new symptoms as new.

Questions to ask before you book, about infection and aftercare (the rest are in our consultation questions):

• Do you give written aftercare instructions?
• After I leave Thailand, do you review photos, and through what channel?
• Who do I contact out of hours, and how?
• What is your protocol if an infection starts after I'm home?
• Which steps will the surgeon do, and which will staff do?

Still choosing a clinic? Get a free quote from the ones you're comparing, free and with no obligation, and put the same five questions to each. Nothing goes to a clinic without your OK.

What Patients Report

Yellow at day 5 fits the review's bruising window, and the forum's answer was to ask the surgeon. "Im at day 5 and have yellowing in areas also. I think its just bruising, as everything else looks and feels normal for me." (u/GrubyKobietaaaa, May 2026), and the reply: "You're unlikely to get a reply from a doctor on here though." (u/ZzDangerZonezZ, same thread).

Two posts about swelling weeks after surgery got no patient reply with advice: "I got swelling on oct1 i thought it is normal which increased today a bit more is this usual" (u/Elegant_Wealth_7112, October 2026, 24 days after a crown transplant), and a poster 20 days out with "visible bumps in height of ears which weren't there" (u/BigBoyBloater, September 2026).

By our reading of the review's table, swelling at day 20 or 24 is outside every window it gives, and that's a call to the clinic.

None of these posters says they are a doctor.

The threads are 1hgzwrr, 1j81ki0, 1tlne2h, 1tkbyp1, 1pla091, 1wxkjcu and 1wnzbra, all in r/HairTransplants; several original posts have since been removed and only the comments quoted here remain.

Frequently asked questions

Is a yellow crust a sign of infection?

Not on its own. Crusts form within 2 to 3 days and clear by day 7 to 10, and bruising can leave purple-yellow skin for up to 10 to 15 days, both normal healing in the 2026 review. The crusts it lists as a sign of infection are "honey-colored", and its list of signs also includes increasing pain, swelling and pus, and any crust still there past 2 weeks is one for your clinic to look at.

Is one pimple on the transplanted area a problem?

Usually it's folliculitis, one of the most frequently reported complications after FUE, and spots around week 10 often come with the new hairs pushing through. One spot without pain, heat or spreading redness is worth a photo to the clinic. A spot that's painful, hot, growing or leaking pus is a same-day doctor visit, and the doctor decides whether a swab and antibiotics are needed.

How long after a hair transplant can an infection start?

The review's table puts infection and folliculitis in the first 1 to 4 weeks. A general surgical-wound page from an NHS trust says a wound infection "can happen at any time from 2 to 3 days after surgery until the wound has healed." Rare mycobacterial infections are different: the published cases presented 3 weeks and 2 months after surgery.

Should I take the antibiotics I already have at home?

No, not without a doctor saying so. The review wants a culture with sensitivity testing before antibiotics are started, and a Thai clinic's own FAQ tells patients it doesn't recommend buying medicine to take themselves. Send the clinic a photo and see a local doctor the same day if your symptoms include pain, heat, pus or fever.

What if the antibiotics aren't working?

Go back to the doctor who started the treatment, and tell them you had surgery abroad and when. The NHS standard for a skin infection is to contact a doctor if you don't start to feel better 2 to 3 days after starting antibiotics. For an infection that keeps draining or growing, the CMAJ authors say unusual organisms should be considered and specimens taken to identify them, because some take weeks to grow in the lab.

Who should I see if I'm already home?

A local doctor the same day, and the clinic by photo at the same time. The NHS trust's wound advice is to contact your doctor or a GP "straight away" with any wound problem. For the emergency signs in the table at the top, use your local emergency number.