Lasers - Everything You Ever Wanted to Know But Were Afraid to Ask - Toronto Dermatology Centre
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Lasers – Everything You Ever Wanted to Know But Were Afraid to Ask

Laser technology is being used for an increasing number of cosmetic treatments. Examples include hair reduction, skin resurfacing for wrinkle reduction and/or treatment of acne scars, removal of pigmented blemishes (e.g., age spots, melasma), acne reduction, and treatment of vascular lesions (e.g., port wine stains and spider veins). Lasers are also used to remove tattoos. 

A number of medical devices using related technologies have been licenced in Canada for use in cosmetic treatments. These technologies include various types of lasers, intense pulsed light and radio-frequency energy, all of which operate on the same basic principle.

Lasers emit an intense beam of light or energy (visible or invisible) with a specific wavelength, which is targeted at a specific type of tissue in the part of the body being treated. When the beam of energy reaches its target, it is absorbed and converted into heat. If the procedure is done properly, the heat inactivates or destroys cells in the target area without having a significant effect on the other normal cells that surround it.

For hair reduction, the laser system targets the melanin (or dark colouring) in the hair follicle (hence why dark hairs respond best to treatment). For wrinkle reduction and treatment of acne scars, the device targets and damages cells near the surface of the skin. This in turn helps to stimulate the production of new collagen cells underneath. To treat vascular lesions including spider veins or the redness of rosacea, the light from the laser is directed at the blood vessels. If the appropriate wavelength is used, the vessel wall is injured and is subsequently absorbed by the body.

The effectiveness of cosmetic laser procedures depends on many factors, including:

  • Choice of the correct device for a given treatment;
  • The training and skill of the person operating the device;
  • The wavelength of the beam of energy that targets the tissue;
  • The power settings used, the duration of each energy pulse, the amount of time between pulses, the number of pulses per treatment, and the number of treatments administered; and
  • The colour of the skin and/or hair of the person being treated.
  • Whether a medical-grade laser is used as opposed to those weaker devices typically found at spas and salons.

These factors also affect the type and severity of risks associated with the treatments.

Even when the correct laser instrument is chosen for a given treatment, there is a risk of temporary effects, including immediate pain, reddening of the skin, bruising and swelling. Some lasers are equipped with cooling devices to reduce this risk. Other possible side effects include the formation of blisters, burns and infection. In some cases, there may be lightening or darkening of the skin, but these complications are usually temporary.

You may be disappointed with the results if you are not a suitable candidate or do not have realistic expectations. For example, laser hair reduction works best for people with light skin and dark hair. It is not nearly as effective on blond, red, grey or white hair. A proper assessment with an experienced dermatologist or laser technician will help to determine if you are a good candidate or not. Most people need multiple sessions in order to achieve good results, not only with laser hair reduction, but with most cosmetic laser procedures. 

Also, the degree of effectiveness for many types of cosmetic laser treatments is subjective. You may not be happy with results that someone else would consider to be successful (e.g. some people are perfectionists). In addition, some treatments, such as skin resurfacing, require detailed follow-up care, with good quality home care products.

The best way to minimize your risk is to make informed decisions based upon thorough research. Find out whether you are a suitable candidate for the procedure you have in mind. Look into the requirements for recovery time and follow-up care. Investigate the risks, and weigh them against the benefits expected for someone with your type of skin and/or hair.

If you decide to go ahead, be sure that the person who will operate the laser device has the training and experience needed to perform the procedure safely and effectively, and that they are operating in a medical clinic under supervision of a physician. Does it really make sense to trust your laser treatments to a hair or nail salon technician?  Experts in cosmetics with proper training in laser techniques should be able to perform hair reduction treatments with minimal risks to the Canadian public. Avoid tanning before and after treatments for laser hair reduction. Tanning increases melanin production in your skin and can reduce the effectiveness of the treatment.

For any other type of laser treatment, Health Canada advises you to seek the services of a licenced health care professional with specialized training in laser procedures. This is particularly important if you are seeking treatment for growths or pigmented areas on your skin.

Be sure to wear eye protection, and ask about cooling the skin during laser treatments. Also, make sure the laser device has been licenced by Health Canada for the specific procedure you have in mind. The licenced uses, expected benefits and potential risks of licenced laser devices are described in either the Operator’s Manual or the Training Manual supplied by the manufacturer.

Finally, make a commitment to participate fully in any follow-up care that may be required. Be sure to stick with the treatment guidelines and timelines suggested to you by your laser technician. Don’t be afraid to ask questions or let your technician know if you feel you are not achieving your goals. It is your body, your skin, and our job to provide you with the best care possible!

~ Sheri Roselle, Medical Esthetician at Toronto Dermatology Centre

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