What Is IPL—and Why Does Everyone Keep Talking About It?

If you have been researching treatments for sun spots, redness, uneven skin tone or unwanted hair, chances are you have come across three letters repeatedly: IPL.

IPL stands for Intense Pulsed Light, a non-invasive light-based technology used in aesthetic dermatology for several different concerns. Depending on the device and treatment settings, IPL can target pigment, visible blood vessels or melanin within hair.

That versatility is a big part of why IPL has become so widely discussed. But it also creates confusion. IPL is not a laser, it does not treat every skin concern, and the results depend considerably on what is being treated, your skin characteristics and the device and settings being used.

Here is what is actually worth knowing before considering IPL treatment in Montreal.

What Is IPL Treatment?

IPL uses short pulses of broad-spectrum light delivered into the skin.

The technology works through a principle called selective photothermolysis. In simple terms, specific components within the skin absorb light energy and convert it into heat.

Which target absorbs the energy depends on the wavelengths and treatment parameters selected.

For example, IPL may be configured to target:

• Melanin, the pigment involved in brown spots and hair colour
• Hemoglobin, found in blood and therefore relevant to certain visible vascular concerns

This ability to adjust treatment parameters is what allows IPL technology to have several aesthetic applications.

IPL has been studied for unwanted hair, pigmented lesions, vascular concerns and photodamaged skin, among other indications.

IPL Is Not a Laser

This is one of the most common misconceptions about IPL.

Although IPL and lasers both use light energy, they are different technologies.

A laser produces a relatively specific wavelength of light. IPL uses a broader spectrum of wavelengths that can be filtered and adjusted according to the intended target.

Neither technology is automatically “better.” The appropriate option depends on the concern being treated, skin characteristics and the specific equipment being used.

Think of IPL less as one single treatment and more as a platform that can use light differently depending on the goal.

What Can IPL Be Used For?

One reason IPL comes up so often in aesthetic medicine is that the technology has several potential applications.

Brown Spots and Sun-Related Pigmentation

Years of ultraviolet exposure can contribute to visible changes in pigmentation, including freckles and solar lentigines, commonly called sun spots or age spots.

Because melanin absorbs certain wavelengths of light, appropriately selected IPL treatments can target some superficial pigmented lesions.

Research evaluating IPL for photorejuvenation has reported improvements in pigmentation and signs of photodamage. However, the quality of evidence varies between studies, and not every type of pigmentation should be treated with IPL.

That last point is particularly important.

A brown spot should not automatically be assumed to be a cosmetic sun spot. Pigmented lesions should be appropriately assessed before an energy-based aesthetic treatment is performed.

Redness and Visible Blood Vessels

Hemoglobin also absorbs light energy, which makes certain vascular concerns another application for IPL.

IPL has been studied for facial erythema, telangiectasia, which refers to small visible blood vessels, and redness associated with rosacea.

A 2024 systematic review found that most of the included studies reported improvements in rosacea-associated erythema and telangiectasia following IPL. However, the authors also emphasized that the methodological quality of the available studies was poor.

In other words, there is encouraging clinical evidence, but it should not be interpreted as IPL being a cure for rosacea or being appropriate for every person with facial redness.

Photorejuvenation

“Photorejuvenation” is a broad term used for light-based treatments intended to improve visible signs of photodamage.

A systematic review examining IPL for skin rejuvenation included 16 studies and 637 participants. Improvements were reported across concerns including pigmentation, redness, telangiectasia, texture and signs of photoaging.

However, the researchers also identified considerable variation between treatment protocols and limitations in study quality.

IPL can therefore be a useful tool for selected signs of photodamage, but expectations should remain specific to the concern being treated rather than treating “skin rejuvenation” as a guarantee of dramatically younger-looking skin.

Unwanted Hair

IPL can also be used for long-term hair reduction.

In this application, light energy targets melanin within pigmented hair. The absorbed energy generates heat that can affect structures involved in future hair growth.

Because hair follicles move through different growth phases, multiple treatment sessions are generally required.

IPL is not equally effective for every hair colour. Hair containing little melanin, particularly white and grey hair, cannot provide the same light-absorbing target as darker hair. Blond and red hair may also respond less predictably.

And despite the phrase “permanent hair removal” appearing frequently online, IPL is more accurately discussed in terms of long-term hair reduction. Complete and permanent removal of every hair should not be guaranteed.

IPL for Skin vs. IPL for Hair Removal

The same general technology can serve very different purposes.

IPL for Skin	IPL for Hair Reduction
May target melanin or hemoglobin	Primarily targets melanin in hair
Used for selected pigmentation and vascular concerns	Used to progressively reduce unwanted hair
Treatment parameters depend on the skin concern	Treatment parameters depend on hair, skin and treatment area
Usually performed as a treatment series when appropriate	Multiple sessions are generally required
Results depend on the condition being treated	Results depend significantly on hair colour and skin characteristics

This is why simply asking whether “IPL works” does not have a useful yes-or-no answer.

The real question is: IPL for what?

Why Is IPL So Popular?

Part of IPL's popularity comes from its versatility.

Instead of being designed around a single cosmetic concern, IPL platforms can use different filters and treatment parameters to address different targets.

It is also a non-surgical procedure, and many IPL applications do not require the recovery associated with more aggressive resurfacing treatments.

But popularity should not be confused with universal suitability.

The flexibility that makes IPL useful also makes proper treatment selection important. Parameters need to be chosen according to the person, the concern and the specific device.

What Does an IPL Appointment Feel Like?

Your appointment will vary depending on the area and reason for treatment.

Before beginning, the provider should assess your skin, treatment goals, relevant medical history, medications and recent sun exposure. Appropriate eye protection is also an essential part of light-based treatment.

During the procedure, an IPL handpiece is positioned against the skin and delivers controlled pulses of light.

People may experience warmth or a brief snapping or stinging sensation with each pulse. Sensitivity varies according to the treatment area, device settings and individual pain tolerance.

An appointment treating a small area may be relatively quick, while larger areas naturally require more time.

Is There Downtime After IPL?

Downtime depends on the indication and treatment intensity.

Temporary redness, warmth or mild swelling can occur following IPL. When pigmented spots are targeted, they may temporarily appear darker before gradually changing as the skin recovers.

However, IPL should not be described as completely risk-free or having guaranteed “zero downtime.”

Potential adverse effects reported with IPL and other light-based treatments include burns, blistering and temporary or persistent changes in pigmentation.

Your provider should explain what reactions are expected for your particular treatment and what symptoms should prompt you to contact the clinic.

Is IPL Safe for Every Skin Tone?

Not necessarily.

Melanin is present not only in hair and pigmented lesions but also in normal skin. Because melanin absorbs light, skin pigmentation influences how light-based treatments need to be performed.

The risk of unwanted heating and pigment changes can be different in darker or recently tanned skin.

This does not mean that every person with a darker skin tone is automatically excluded from every light-based treatment. It means that device selection, settings, practitioner experience and individual assessment matter.

A treatment advertised simply as “safe for all skin tones” deserves more scrutiny unless that claim is supported for the exact device and intended treatment.

How Many IPL Treatments Do You Need?

There is no meaningful universal answer.

Someone treating unwanted hair will follow a different protocol from someone treating visible pigmentation or vascular concerns. Even within the same indication, the number and spacing of appointments can vary.

Factors that may influence the treatment plan include:

• the concern being treated
• treatment area
• skin type
• hair colour and density when treating hair
• severity and depth of pigmentation or vascular concerns
• the specific IPL device and parameters
• response to previous treatments

A consultation is therefore a better place to establish realistic expectations than a fixed number found online.

When Should IPL Be Avoided?

Contraindications depend partly on the specific IPL device and treatment indication, so your provider should review them individually.

Factors such as recent tanning or significant sun exposure, photosensitizing medications, certain skin conditions and relevant medical history may affect whether or when treatment should be performed.

Pregnancy policies and medication restrictions can also vary according to treatment protocols and device instructions.

Always disclose medications, supplements, medical conditions, recent cosmetic procedures and changes in your skin during your consultation.

IPL vs. Other Skin Treatments

IPL is not designed to replace every aesthetic treatment.

For example, a treatment aimed primarily at pigmentation or vascular redness serves a different purpose from microneedling, which creates controlled micro-injuries in the skin, or injectable treatments that address entirely different aesthetic concerns.

Even within light-based treatments, lasers and IPL systems differ in the way they deliver energy.

Choosing between them should start with the concern rather than the technology.

Someone primarily bothered by brown spots may need a different approach from someone concerned about acne scarring, unwanted hair, persistent redness or skin laxity.

This is where an individualized consultation becomes useful.

So, Is IPL Worth It?

For the right person and the right concern, IPL can be a useful option for addressing selected pigmentation, vascular concerns, photodamage or unwanted hair.

The scientific evidence is stronger for some applications than others, and outcomes vary considerably between devices, protocols and individuals. IPL should therefore be approached as a professional treatment with specific indications rather than a universal solution for better skin.

If you are considering IPL treatment in Montreal or the West Island, CurAge offers consultations to assess your skin, discuss what you would like to improve and determine whether IPL or another treatment is appropriate for your goals.

Book a consultation with CurAge to explore your IPL treatment options.

Frequently Asked Questions About IPL

What does IPL stand for?

IPL stands for Intense Pulsed Light. It is a light-based technology that uses broad-spectrum pulses of light and adjustable treatment parameters to target specific components within the skin.

What is IPL good for?

Depending on the device and treatment parameters, IPL may be used for selected pigmentation, visible vascular concerns, signs of photodamage and unwanted hair. It is not appropriate for every skin concern.

Is IPL the same as laser treatment?

No. Lasers generally use a more specific wavelength of light, while IPL emits a broader spectrum that can be filtered for different targets.

Does IPL remove dark spots?

IPL may improve certain superficial pigmented lesions, including some sun-related pigmentation. Not every dark spot should be treated with IPL, however. Pigmented lesions should be appropriately assessed before treatment.

How long do IPL results last?

There is no single duration that applies to every IPL treatment. Longevity depends on what was treated, individual biology, future sun exposure and other factors. Hair reduction and treatment of pigmentation, for example, have very different expectations.

Can I get IPL if I have a tan?

Recent tanning can affect how light energy is absorbed by the skin and may increase treatment risk. Tell your provider about recent sun exposure, self-tanner or tanning before treatment and follow the pre-treatment instructions for the specific device being used.

This article is provided for general educational purposes only and does not replace individualized medical advice, diagnosis or treatment. Suitability for IPL depends on your skin characteristics, medical history, medications, treatment goals and the specific device and parameters being used. A qualified professional should assess your individual circumstances before treatment.