Laser Safety: What a Responsible Clinic Does

A responsible laser clinic takes a full medical history, assesses your skin type, protects your eyes, uses devices licensed by Health Canada, and has a physician overseeing care and complications. It also tells you plainly when laser is not a good idea. Knowing these steps helps you ask the right questions wherever you are treated.

Lasers are medical devices

Aesthetic lasers deliver concentrated light energy that heats or removes tissue. Used well, that energy is precise and controlled. Used carelessly, it can cause burns, pigment changes, scarring or eye injury. In Canada, lasers sold for medical and aesthetic use are regulated by Health Canada as medical devices, and they should carry a valid medical device licence for their intended uses.

It is reasonable to ask what device will be used and whether it is licensed in Canada. The Fotona system, for example, combines Er:YAG and Nd:YAG wavelengths, which are described in what the Fotona laser is and how it works. A clinic should be able to explain the device in plain language.

A thorough medical history comes first

Before any laser treatment, you should be asked about your health in detail. This is not paperwork for its own sake; many answers change whether laser is safe, or how it should be done. Expect questions about:

• Current and recent medications, including isotretinoin, retinoids, antibiotics and anything that increases light sensitivity.
• Pregnancy or breastfeeding.
• Cold sores, keloids or unusual scarring.
• Skin conditions such as melasma, vitiligo, psoriasis or eczema.
• Seizure disorders triggered by light, autoimmune conditions or problems with healing.
• Recent sun exposure, tanning or self-tanner use.
• Any implants, tattoos or permanent makeup in the treatment area.

If you have a mole or spot that has changed, bled or looks unusual, it should be assessed medically before any laser treatment on or near it. Laser should never be used to treat a lesion that has not been properly diagnosed.

Skin typing and test spots

Skin tone affects how laser energy is absorbed. Clinicians commonly use the Fitzpatrick scale, which groups skin from types I to VI based on colour and how it responds to sun. Darker skin contains more melanin, which absorbs laser energy and raises the risk of burns and pigment changes if settings are not adjusted.

Skin typing guides the choice of wavelength, energy and cooling. For many treatments, especially in darker skin or where pigment risk is a concern, a small test spot may be done first and checked after several days to weeks. Test spots are not a perfect predictor, but they add a useful layer of caution.

Settings are also adjusted from session to session. If your skin reacted more than expected last time, if you have new sun exposure, or if a medication has changed, the plan should change too. A careful provider records the settings used and your skin's response, so each visit builds on the last rather than starting from scratch.

Eye protection and the treatment room

Laser light can damage the eye, sometimes permanently, even from a reflection. Everyone in the room, including you, should wear eyewear rated for the specific wavelength being used. For treatments near the eyes, protective shields may be placed directly over the eyes.

Tattoos, permanent eyeliner and dark makeup near the eyes need special care, because pigment in these areas can absorb laser energy strongly. They may need to be covered, avoided or treated with different settings.

Other safety practices include keeping the room door closed with warning signage while the laser is in use, removing reflective jewellery, keeping the device in good repair with regular servicing, and having a fire safety plan, since some lasers can ignite certain materials. Staff should be trained in the specific device and in laser safety principles.

Physician oversight and complication management

Even with careful technique, complications can occur. A physician-led setting means a doctor is responsible for patient assessment, treatment protocols and managing problems if they arise. This includes recognising and treating burns, infections, cold sore outbreaks and pigment changes promptly, and knowing when to refer to a dermatologist or other specialist.

You should be given clear aftercare instructions and a way to contact the clinic if you have concerns, such as blistering, increasing pain, pus, fever or spreading redness. Follow-up visits allow the team to check healing and adjust plans for future sessions. More about this model of care is in what "physician-led" means in medical aesthetics.

Honest consent and realistic expectations

Informed consent is more than a signature. Before treatment, you should understand what the laser is expected to do, how many sessions may be needed, what recovery looks like, the possible risks and the alternatives, including doing nothing. Fees should be explained in full before any treatment, as aesthetic laser services are not covered by MSI.

The main risks of laser include redness, swelling, discomfort, blistering, temporary darkening or lightening of the skin, infection and, rarely, scarring or eye injury. Results vary from person to person. A responsible provider will not promise perfect outcomes and will sometimes recommend skincare, a medical referral or no treatment at all.

Laser is not suitable, or should be postponed, for people who are pregnant, have an active infection in the area, have an undiagnosed skin lesion, have a fresh tan, or take medications that make skin unusually sensitive, until those issues are resolved or assessed.

Frequently asked questions

Is it rude to ask about a clinic's safety practices?

Not at all. Asking who will treat you, who supervises, and what happens if there is a complication is a sensible part of any decision.

Why do I need to repeat my medical history at every visit?

Medications, pregnancy status, sun exposure and health conditions change. A quick update each time keeps treatment safe.

Do I really need to wear the goggles if my eyes are closed?

Yes. Closed eyelids do not reliably block laser light. Proper eyewear or shields are essential.

If you would like to understand the safety steps involved in a laser treatment you are considering, a consultation at HealthPark Medical Aesthetics is a chance to ask questions, review your history and decide calmly whether treatment is right for you.