Hair Transplant Side Effects: What Is Normal and What Can Go Wrong?
Hair transplant side effects are a common concern before surgery. Patients often want to know whether the procedure will hurt, how much swelling to expect and what their scalp will look like afterwards. They also want to understand which symptoms are normal and what might be a complication.
Most effects after FUE hair transplant surgery are temporary. Redness, swelling, tenderness, scabbing and temporary changes in sensation are all expected during the early healing period (Romera de Blas et al., 2026). Understanding the difference between normal recovery and a complication can make the whole process easier.
Dr Peter Thomas
MBBS MRCGP FUE Hair Transplant Surgeon
UK-trained doctor and specialist FUE hair transplant surgeon with postgraduate qualifications including MRCGP and specialist training to CCT level. Bringing refined FUE hair restoration techniques and renowned for natural results.
The Short Answer
Most hair transplant side effects are temporary and improve as the scalp heals. Common effects include:
- Tenderness or mild pain
- Swelling
- Redness
- Scabbing
- Itching
- Tightness
- Temporary numbness or altered sensation
- Shedding of some transplanted hairs during the following weeks
Less commonly patients can develop problems such as persistent bleeding, infection, folliculitis, delayed healing or an adverse reaction to medication (Romera de Blas et al., 2026). The important point is not to expect the scalp to look completely normal in the early phases after surgery. Instead, you should know what is expected and when to reach out for more advice from your clinic team.
What does a hair transplant feel like on the day?
FUE hair transplantation is performed under local anaesthetic. This involves injections and are often the part of the procedure patients find uncomfortable. There is sharpness and stinging before the scalp becomes numb.
Once the anaesthetic is working you should not feel pain during the procedure. However, you may still notice pressure, or sensations of movement and vibration.
Hair transplant procedures can also take several hours. As a results some people experience stiffness or general discomfort from remaining in one position for long periods, but there is often plenty of opportunity for rest breaks if required.
What are the common side effects after a hair transplant?
Pain and Tenderness
Some soreness is normal once the local anaesthetic begins to wear off. The donor area often feels more tender than the transplanted area particularly during the first night or two. For most patients, this feels more like tenderness or tightness than severe pain and it should gradually improve.
If pain becomes significantly worse particularly with increasing redness, warmth or swelling, contact your surgical team.
Swelling
Hair transplant swelling commonly develops during the first few days (Romera de Blas et al., 2026). It usually affects the forehead. Gravity can then cause swelling to move towards the eyebrows or around the eyes before it settles. This can look unsightly but it does not necessarily indicate a problem.
Sleeping with your head elevated, avoiding strenuous activity and following your medication instructions can help. Significant swelling should usually begin to settle rather than continue worsening.
For a more detailed recovery timeline see my hair transplant aftercare guide.
Redness
Redness around the donor and transplanted areas is expected. For most patients it becomes less noticeable during the first one or two weeks. However, some redness can persist for longer particularly in fair or sensitive skin.
The important distinction is whether it is settling. Increasing redness, especially with worsening pain, heat, discharge or feeling unwell may mean a complication rather than normal healing.
Scabbing
Tiny scabs form around transplanted grafts as part of the normal healing process (NHS, 2026a). These gradually soften and clear as washing becomes more thorough. Avoid scratching or picking them off.
Patients sometimes see short hairs within the scabs and worry that they have pulled out a graft. Usually, the hair shaft has shed while the follicle remains beneath the skin. I explain this in more detail in Hair Transplant Shedding: Have I Lost a Graft?
Itching
Mild itching is also common while the scalp heals (Romera de Blas et al., 2026). It is vital to avoid scratching the transplanted area. Scratching can irritate healing skin and may disturb grafts during the early recovery period.
If itching becomes severe or develops alongside a rash, increasing redness or other symptoms seek advice rather than applying additional products yourself.
Numbness and Altered Sensation
Temporary numbness, tingling or altered sensation can occur in both the donor and recipient areas. This happens because very small sensory nerves within the skin are affected during surgery. Sensation usually improves as the area heals. However, recovery varies between patients. Persistent altered sensation is not common but can happen (Romera de Blas et al., 2026).
Is hair shedding a side effect of a hair transplant?
Yes but it usually happens later and after the immediate postoperative effects. The transplanted hairs commonly begin to shed during the first few weeks. This can be alarming because patients understandably associate falling hair with losing their transplant. However, the transplanted follicle usually remains in place beneath the skin before entering a new growth cycle.
Some surrounding native hair can also temporarily shed after surgery. This is often called shock loss or postoperative effluvium. Most patients should therefore expect the appearance of their hair to change before new growth becomes established.
What complications can happen after a hair transplant?
Hair transplantation is generally considered a low risk surgical procedure. However, complications can occur. Reported problems typically include pain, swelling, bleeding, infection, folliculitis, altered sensation, scarring and rare cases of tissue necrosis (Romera de Blas et al., 2026).
Bleeding
A small amount of spotting or oozing can occur during the early healing period (NHS, 2026a). Persistent or heavy bleeding is different. If bleeding does not settle with the instructions provided by the surgical team you should contact the clinic.
Your medical history and medication are important here. This is one reason medicines and supplements that may affect bleeding should be discussed before surgery. Importantly, the shouldn’t be stopped without medical advice. My pre-surgery guide explains how to prepare for a hair transplant including medication, alcohol and scalp care.
Infection
Infection after a hair transplant is uncommon but it remains a potential complication of any surgery (NHS, 2026a; Romera de Blas et al., 2026). Warning signs can include:
- Increasing pain
- Spreading redness
- Increasing warmth
- Pus or unusual discharge
- Fever
- Feeling generally unwell.
Redness alone does not necessarily mean infection. The pattern and progression of symptoms matter. Contact the clinic promptly if you are concerned.
Folliculitis
Small spots or pustules can sometimes develop around hair follicles during recovery (Romera de Blas et al., 2026). This is known as folliculitis. Some cases are mild and settle without significant treatment. However, widespread, painful or persistent pustules should be reviewed. Do not squeeze or repeatedly pick at them.
Scarring
Every surgical procedure involving the skin creates some degree of scarring. With FUE, individual follicles are removed using small punches. This leaves many tiny circular scars rather than the linear scar associated with strip (FUT) surgery. In most patients these scars become difficult to see once the donor hair grows. However, visibility depends on several factors including skin type, healing, punch size, extraction pattern and how short the donor hair is worn.
Hypertrophic or keloid scarring is possible but uncommon (Romera de Blas et al., 2026).
Skin Necrosis
Skin necrosis means an area of tissue loses its blood supply and becomes damaged. It is a recognised but rare complication of hair transplantation. Factors such as reduced blood supply, smoking and excessive trauma to the recipient area may increase risk (Romera de Blas et al., 2026). Areas that look unusually dark, painful or damaged should be assessed promptly.
Can hair transplant medicines cause side effects?
Some symptoms experienced during or shortly after a hair transplant can come from medicines used around the procedure rather than the surgery itself. The medicines used vary between clinics and patients. Common examples include local anaesthetic such as lidocaine, adrenaline, diazepam and corticosteroids such as prednisolone.
Lidocaine
Lidocaine is commonly used to numb the scalp. The injections can sting briefly. Afterwards temporary numbness, tingling or dizziness may occur (Electronic Medicines Compendium, 2026).
More serious reactions are rare and are usually associated with excessive lidocaine levels in the blood, rapid absorption or accidental injection into a blood vessel. Symptoms of local anaesthetic toxicity can include ringing in the ears, tingling around the mouth, tremor, visual disturbance, marked drowsiness or, in severe cases, seizures or heart rhythm problems (Electronic Medicines Compendium, 2026).
These risks remain exceptionally uncommon but reinforce why hair transplantation should always take place in an appropriately regulated medical environment. I discuss hair transplant safety and an unfortunate case that made international headlines here.
Adrenaline
Adrenaline is often combined with local anaesthetic because it constricts blood vessels. This can reduce bleeding and prolong the effect of the anaesthetic. However some patients briefly notice a racing heartbeat, tremor, sweating, light-headedness or a feeling of anxiety. These symptoms are usually short-lived. Adrenaline can also affect heart rate and blood pressure (Electronic Medicines Compendium, 2026). Therefore, your medical history and regular medicines should be reviewed before surgery.
Diazepam
Diazepam may be offered to reduce anxiety and make a long procedure more comfortable. Its most noticeable effects are usually drowsiness and tiredness (NHS, 2026b). Some patients can also feel dizzy or unsteady.
Patients who receive diazepam should not drive themselves home after the procedure.
Prednisolone
Prednisolone is a corticosteroid that may be used around hair transplant surgery to help reduce inflammation and swelling. With short courses of steroids, significant side effects are much less likely. However some people may experience effects such as (NHS, 2026c):
- Indigestion
- Difficulty sleeping
- Mood changes
- Temporary increases in blood glucose
Why your medical history is important?
The above medicines are routinely used safely but they are not suitable for everybody. Before surgery your surgeon should know about your prescribed medicines, over-the-counter treatments, supplements, allergies and relevant medical conditions. This is particularly important if you have cardiovascular disease, blood-pressure problems, diabetes, previous reactions to anaesthetic or sedatives, or take medicines that may interact with treatment given on the day.
More information about medications and pre-surgery planning can be found here.
When should you contact your clinic?
Most early symptoms improve gradually. Contact your surgical team if you develop:
- Heavy or persistent bleeding
- Pain that is becoming worse
- Increasing redness or warmth
- Pus or unusual discharge
- Fever or feeling unwell
- Severe or worsening swelling
- Numerous painful pustules
- An unexpected medication reaction
- An area of skin that appears unusually dark or damaged
- Significant trauma to the grafted area
The NHS also advises contacting the clinic if you experience severe pain or unexpected symptoms after a hair transplant (NHS, 2026a). If something does not look or feel as you were told to expect it is usually better to ask.
What about poor growth, overharvesting or disappointing results?
Patients sometimes use the term hair transplant side effects to describe anything that has gone wrong. However, poor density, an unnatural hairline, overharvesting or inadequate growth are better described as outcome-related issues rather than side effects.
These problems tend to become apparent over months rather than during the first few days. They are also influenced by planning, patient selection, donor management and surgical technique. For example, extracting too many grafts from one area can leave the donor region visibly thin. Likewise, a technically successful transplant may still disappoint if the planned density or hairline does not meet expectations.
How can hair transplant risks be reduced?
It’s not possible to remove every risk. However, careful planning can reduce avoidable problems.
This starts before surgery with an appropriate assessment, review of your medical history, examination of the scalp and realistic discussion about the procedure (Romera de Blas et al., 2026). During surgery, careful donor management, sterile technique and appropriate handling of the scalp and grafts also matter. Afterwards, following your postoperative instructions helps protect the grafts while the skin heals.
A final word from Dr Thomas...
Most hair transplant side effects are temporary and form part of normal healing. The key is knowing what should gradually improve and recognising symptoms that are worsening or unexpected.
If you are concerned about your recovery, contact your surgical team rather than waiting for a possible complication to settle on its own.
Speak with Dr Thomas and the team by booking a consultation today. You can also find more information about hair transplants on Dr Thomas’s Instagram.
DrThomas
References
Electronic Medicines Compendium (2026) Lidocaine 2% with adrenaline (epinephrine) 1:200,000 solution for injection: Summary of Product Characteristics. Available at: https://www.medicines.org.uk/emc/product/2396/smpc (Accessed: 27 September 2026).
NHS (2026a) Hair transplant. Available at: https://www.nhs.uk/tests-and-treatments/cosmetic-procedures/cosmetic-surgery/hair-transplant/ (Accessed: 27 September 2026).
NHS (2026b) Diazepam. Available at: https://www.nhs.uk/medicines/diazepam/ (Accessed: 27 September 2026).
NHS (2026c) Side effects of prednisolone tablets and liquid. Available at: https://www.nhs.uk/medicines/prednisolone/side-effects-of-prednisolone-tablets-and-liquid/ (Accessed: 27 September 2026).
Romera de Blas, A., Vega Díez, D., Ricart Vayá, J.M. and Gómez Zubiaur, A. (2026) ‘Complications in follicular unit excision hair transplantation: current evidence and practical approaches’. Available at: https://pmc.ncbi.nlm.nih.gov/articles/PMC12909172/ (Accessed: 27 September 2026).
