London Skin Clinic

The Truth About Laser Mole Removal: What Works and What Doesn’t

Mr. Onur Gilleard

Qualifications & Experience

Mr Onur Gilleard is a distinguished consultant plastic surgeon on the GMC specialist register. He previously held an NHS consultant post at St Bartholomew’s Hospital in London, specialising in skin cancer and microsurgical reconstruction. In 2021, Mr Gilleard transitioned from the NHS to dedicate himself fully to private practice, allowing him to focus exclusively on providing personalised, high-quality care to his patients. He is recognised as an expert in laser treatments, having conducted research and developed advanced treatment protocols using cutting-edge laser technology to optimise both clinical outcomes and cosmetic results.

Laser mole removal is a real technique with a narrow, legitimate use and one structural drawback that decides most cases: it destroys the tissue rather than removing it, so there is nothing left to examine. That is an acceptable trade for a small, flat lesion already assessed as benign in a place where a linear scar would be conspicuous. It is not acceptable for a lesion nobody has properly examined — and those are frequently the same lesions people most want lasered.

What the Laser Actually Does

Ablative lasers vaporise tissue by heating the water inside it. Pigment-selective lasers work differently, delivering energy in extremely short pulses absorbed preferentially by melanin, which fragments the pigment rather than removing the lesion.

In practice this clinic uses a DEKA Smartxide CO2 laser, adding vascular modulation with a DermaV laser at two weeks where the scar would benefit from it. Where pigment remains, a further CO2 treatment is used. The reason for the second step is the most common complaint after laser removal — pigment reappearing months later because melanocytes left in the base repopulated the site.

Laser How it works Where it fits
CO2 (10,600 nm) Ablative; strongly absorbed by water, vaporises tissue layer by layer Removing the raised or surface portion of a lesion
Erbium:YAG (2,940 nm) Ablative, more precisely absorbed by water, less residual heat in surrounding tissue Finer ablation with less thermal spread; slower to control bleeding
Q-switched Pigment-selective; nanosecond pulses fragment melanin Residual pigment after ablation, not lesion removal on its own

Erbium versus CO2 is a real distinction but a secondary one here: the choice between them changes how much surrounding tissue is heated, not whether the specimen survives. Neither leaves anything for a pathologist.

Laser removal as it is actually performed. Note the point made throughout this page: the assessment comes before the laser, because the laser leaves nothing to examine.

The Objection That Decides Most Cases

A mole removed by excision goes to the laboratory. A mole removed by laser goes into the air.

The consequence is not theoretical. If an early melanoma is treated with laser, the visible lesion disappears, the patient is reassured by that disappearance, and the disease continues in tissue nobody has examined. There is no report, no margin comment and no thickness measurement, because there is no specimen.

Even where a lesion is later re-examined, the measurement that governs melanoma treatment cannot be recovered. Breslow thickness is measured from the granular layer of the epidermis to the deepest tumour cell, and it sets the width of the definitive excision and whether a sentinel lymph node biopsy is offered — with the threshold that changes the conversation sitting at 0.8 mm.

“A shave biopsy that loses the base can cost a patient a sentinel node biopsy they should have been offered.”— Mr Onur Gilleard, Consultant Plastic Surgeon

The same reasoning applies with more force to ablation, which destroys the base entirely. This is why any pigmented lesion with a diagnostic question is excised whole rather than lasered.

Who Laser Suits

Reasonable candidates share a specific profile.

  • The lesion is small and flat, or barely raised
  • It has been examined with dermoscopy by a consultant and assessed as benign — not merely assumed benign because it has been there a long time
  • It sits somewhere a linear scar would be conspicuous: the face, particularly the nose, cheek or around the eye
  • The reason for removal is appearance, not concern
  • You understand and accept that pigment may return, and that a second treatment is sometimes needed
A raised pigmented mole on the jawline of a bearded man before treatment, and the same site one month after CO2 laser removal showing a flat pink mark where the mole was
Facial mole removed with the CO2 laser, one month on. The lesion is gone and the surface is flat, but the site is still pink and clearly visible at this stage. A month is early — colour continues to settle for several months, which is why judging a laser result at four weeks underestimates it.
Two photographs side by side: a raised brown mole on the chin, and the same area three months after laser removal showing a small pale flat mark.
The same site at three months. The pink has faded to a small pale flat mark that reads as ordinary skin at conversational distance. This is what the paragraph above means about judging a laser result too early — and it is also the honest limit: the mark has not disappeared, it has become unremarkable. Note that the laser destroyed the lesion, so nothing was available to send to the laboratory. That is the trade this page is about.

Who It Does Not Suit

  • Any lesion that has changed in size, shape or colour, or that bleeds, itches or will not heal
  • Deep or junctional naevi, where the pigmented cells extend well below the reach of ablation — treating these superficially reliably produces recurrence
  • Raised, fleshy moles, where shave excision gives a flatter result more predictably
  • Anyone with a personal or family history of melanoma, where the threshold for wanting tissue examined should be lower rather than higher
  • Lesions where the clinician is uncertain — uncertainty is an indication for excision, not for a technique that removes the evidence

Darker skin adds a further consideration. Ablative treatment carries a higher risk of post-inflammatory hyperpigmentation in Fitzpatrick types IV to VI, and the mark left behind can be more noticeable than the original lesion — covered in mole removal in darker skin.

Laser Against the Alternatives

Laser Shave excision Surgical excision
Tissue available for histology No Partial — base not included Yes, whole lesion
Best suited to Small, flat, confirmed-benign lesions in visible sites Raised, clearly benign lesions Anything with a diagnostic question, and deep lesions
Sutures None None Yes
Mark left Flat, round, may be paler or darker than surrounding skin Flat, round, sometimes slightly depressed Fine line, placed along a skin crease
Pigment recurrence Possible Possible Unlikely if fully excised

The fuller comparison, including hyfrecation and cryotherapy, is in shaving versus excision.

Flat brown mole on the trunk before treatment, and the same site immediately after CO2 laser removal showing a small pink area of treated skin
Before, and immediately after CO2 laser removal. The pink area is the treated surface on the day, not the healed result — judge a laser result once the skin has settled, not in the mirror on the way out.
Two photographs side by side: a raised brown mole on the skin, and the same area three months after excision and direct closure, showing a fine pale line where the mole was.
The same comparison from the other side: a raised mole removed by surgical excision and closed directly with stitches, at three months. A fine line, but the whole lesion out and available for histology. Individual results vary.

Assessment First, Then the Method

The sequence matters more than the technique. A £100 consultation covers examination and dermoscopy of the lesions you have come about, and the method follows from what that shows. Removal is £350, each additional lesion at the same visit £200, and histological analysis £180 where the lesion’s features warrant it.

If a clinic offers to laser a mole without examining it with a dermatoscope first, that is the point at which to stop — not because laser is the wrong tool, but because nobody has established whether it is the right one. Book: mole removal or contact the clinic.

Common Questions

Is laser mole removal safe?
The procedure itself is low-risk in trained hands. The risk is diagnostic rather than surgical: laser destroys the tissue, so nothing can be examined afterwards. That is safe for a lesion properly assessed as benign and unsafe for one that has not been.
Am I suitable for laser mole removal?
Suitable candidates have a small, flat lesion that a consultant has examined with dermoscopy and assessed as benign, in a site where a linear scar would be conspicuous, and are having it removed for appearance. Anything that has changed, anything deep, and any history of melanoma points to excision instead.
Is erbium better than CO2 for moles?
Erbium is absorbed more precisely by water and leaves less residual heat in surrounding tissue; CO2 controls bleeding better and ablates faster. It is a genuine distinction, but a secondary one for moles, because neither leaves a specimen to examine.
Does laser leave a scar?
It leaves a flat, round mark rather than a line, which is why it is used on the face. The mark may end up paler or darker than the surrounding skin, and hypopigmentation or hyperpigmentation is more likely in darker skin types.
Can a mole grow back after laser?
Pigment recurring is common and usually means melanocytes left in the base have repopulated the site. It is not evidence of malignancy, but it does need looking at — recurrent pigment in a treated site is genuinely harder to interpret, which is itself an argument for taking a lesion whole the first time.
Why is laser unsuitable for deep moles?
Ablation works from the surface down and reaches only so far. In a deep or junctional naevus the pigmented cells extend below that, so the visible part is removed and the remainder regrows.
Can the mole still be tested if it is lasered?
No. There is no specimen. If you want the certainty of a laboratory report, the lesion has to be excised.
Is laser mole removal available on the NHS?
Not for cosmetic removal. The NHS removes lesions that are clinically suspicious or causing a problem, and does so by excision so the tissue can be examined. The criteria are in removal on the NHS.

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