Laser hair removal myths, debunked.

Where the myths come from

Laser has been around for decades, but the technology has moved on faster than the folklore.

A lot of what people “know” about laser is really a memory of the machines of fifteen years ago, mixed with clinic marketing that overpromises and internet scare stories that overwarn. Modern diode lasers, used properly by a trained practitioner, are a different proposition. Let’s take the big ones one at a time.

Myth 1: “It’s permanent after a couple of sessions”

This is the oversell. Laser gives permanent hair reduction — the regulated, accurate term — not a one-session vanish. Because hair grows in cycles and laser only affects actively growing follicles, you need a course of six to eight sessions to work through them. The result is genuinely long-lasting, but the honest promise is a large reduction plus occasional maintenance, not zero hairs forever. We cover this fully in is laser hair removal really permanent?

Myth 2: “The radiation causes cancer”

The word “laser” makes people think of harmful radiation, but laser hair removal uses non-ionising light — the same category as visible light, not X-rays. It works only at the surface, targeting pigment in the hair follicle, and physically cannot penetrate to or alter the DNA in your cells. Major health bodies recognise no evidence linking it to skin cancer. It’s one of the most studied cosmetic treatments there is.

Myth 3: “It doesn’t work on dark skin”

This was true of early machines, which couldn’t tell the difference between pigment in the hair and pigment in the skin — risking burns on darker tones. Modern diode lasers at 800nm, paired with contact cooling and correct settings, target the hair safely on darker skin. It’s about the machine and the practitioner’s training, not a limit of the treatment. We explain the detail in safe laser for darker skin.

Myth 4: “It’s agony”

Comfort is subjective, but the vast majority of our clients describe the sensation as a warm elastic-band flick, not the ordeal the myth suggests. Our laser cools the skin to around 5°C as it fires, which takes most of the sting out even in sensitive areas. Many people find it more comfortable than waxing — and it gets easier as the hair thins.

Myth 5: “It makes hair grow back thicker”

This is borrowed from shaving folklore (which is itself a myth — shaving only blunts the tip so it feels coarser). Laser does the opposite: by damaging the follicle, any hair that does return comes back finer, lighter and more sparse. You will never see laser make hair thicker.

The honest summary

Laser hair removal is safe, effective and suitable for most people and skin tones — provided you go to a properly trained practitioner using the right machine, and you go in expecting permanent reduction over a course. If you’re in the City of London and want the facts for your own hair and skin, a free consultation and patch test at our Aldgate clinic is the honest place to start.