Last Updated on January 6th, 2020
Laser treatments are the fastest way to deal with scars and hyperpigmentation left behind when acne heals, but can also be beneficial for inflammatory acne. However, it’s not known to be particularly helpful for noninflammatory comedonal acne. The primary benefit of laser therapy, as well as the primary drawback of laser therapy, is that is has very precise effects.
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Acne happens when pores in the skin fill up with dead skin cells, oil, and bacteria. They then eventually become inflamed and burst. When this happens deep within the skin, all that infected gunk spreads among the deeper tissues, resulting in even bigger lesions.
Your body will create collagen to try to repair the damage, which ends up changing the smoothness and the texture of your skin. This could mean depressions and indentations on the skin or excess skin forming. Basically there are two types of scars: hypertrophic and atrophic.
Hypertrophic – This type of acne scar happens when too much collagen is produced and results in skin bumps, flaps of skin or ridge-like areas on the skin.
Atrophic – This type is the opposite, tissue is lost during the healing process, resulting in depressions in the skin. Ice pick and boxcar scars belong in this category.
Acne occurs when skin pores become filled with oil, dead skin cells and bacteria. The pores becomes inflamed and eventually burst. If the pore wall bursts deeper in the skin, the infected debris leaks into the deep tissues, which creates larger lesions.
Lasers produce intense monochromatic light, light that is limited to a very a narrow band of wavelengths. This light has no effect on some substances, and high-intensity effects on others. One setting might heat hemoglobin but have no effect on neighboring skin cells. Another setting might “melt” the melanin that causes deep pigmentation on the skin. A third might vaporize tattoo ink. Dermatologists use lasers to deal with specific substances at specific depths in the skin.
The primary effects of laser light in skin resurfacing are photothermal, heating a particular substance in the skin. The process of using laser to remove blemishes in the skin is known as photothermolysis, the breakdown of selected tissues in the skin. Continuous laser light would destroy tissues surrounding the target as the target tissue heated, so laser skin treatment is usually done with pulsed lasers.
Laser therapy for acne scars and brown spots has been around for decades. It first arrived in dermatologists’ offices about 1980. The early continuous wave neodymium:yttrium-aluminum-garnet (Nd:YAG) laser was used to heat the basal cell layer underneath the skin to stop collagen production. Tissue above the treated layer of the skin charred and sloughed off, initially growing back without scars or pigmentation. Scars always returned, however, about a year after treatment with this early kind of laser.
In the early 1990’s, doctors were introduced to the vascular-specific 585-nm pulsed dye laser (PDL). Treatment with PDL was targeted on hemoglobin. The topmost layers of the skin were unaffected by the laser. Only the hemoglobin in the blood underneath them was heated. Pulsing the laser kept skin above blood vessels from charring. This technique proved to be very effective for removing port-wine and purple skin discoloration, and also acne scars.
A third type of laser treatment, carbon dioxide laser ablation, could be used to remove overgrowth of skin tissue lying on top of scars.
Doctors discovered that the key to getting lasting results from laser therapy was to make sure the immune system did not send white blood cells to “eat” dead skin tissue. Accumulations of the clean-up cells known as macrophages could cause scars to form all over again. Laser treatments were followed by treatment with steroid creams to prevent swelling and malformation of new skin.
The tremendous advantage of acne laser treatments over earlier techniques of scar removal was that it was bloodless. Dermabrasion involved mechanically stripping off just the top 25 layers of skin cells down to the “quick,” where blood vessels were found. Regenerative skin cells underneath this layer could then rise to fill in the scar as they replaced the skin.
Dermabrasion left a bloody wound that could easily be infected. Laser treatment, however, worked from the inside out without bleeding and with much lower risk of infection.
The downside of laser treatments for acne has always been that one treatment is never enough to remove a scar. And certain skin types just may not respond very well to laser treatment.
The darker the skin, the more melanin there is to absorb some of the light energy intended for hemoglobin. Skin above the level of the capillaries serving the skin can char and leave an open wound. When the skin grows back, it may be lighter than surrounding skin. The darker the skin, the greater the problem with loss of pigmentation after treatment.
Another problem in laser treatment of black and dark brown skin is that darker skin tends to form tough scars known as keloids. These disfigurements require more treatment than ordinary acne scars, running greater risk of damage to the skin. About 1 in 6 people with black skin and acne will develop keloids that cannot be treated with laser, compared to about in in 20 people with white or Asian skin and acne.
Even if you have fair skin, there are reasons you may not want to have laser acne treatment.
Laser treatment is not the final answer for acne. It is possible that if you express the expectation that laser treatment will remove 100% of your acne, chances are that your dermatologist will reject you as a patient for this procedure because of unrealistic expectations. Laser acne treatments improve the skin, but they never perfect it.
The best thing to do is avoid scarring all together. If you have acne and are worried about possible scars, there are two simple things to keep in mind that will help.
Don’t Pick – This is probably the hardest thing to do when you have troubling bumps and pimples, but it’s extremely important not to pick at and squeeze them if you don’t want to end up with scars. When you ‘pop’ a whitehead, you’re doing more damage. Inflammation increases and more collagen is lost, which means your skin can’t heal as well it should. It can also lead to bacteria spreading even deeper.
Sun Exposure – It was once widely believed that sun exposure could heal acne. Small amounts of exposure may temporarily help, but not in the long run. In reality, too much direct sun exposure can make acne worse and make it last even longer. Always use sunscreen and protect yourself from sunlight, especially in the middle of the day when sunlight is at its strongest.
Acne is not caused by any single factor, and it is not resolved by any single treatment. If you want to achieve perfect skin, you are going to need to use a combination of techniques at least for months and maybe even for a year or so. No matter what websites and infomercial hosts promise, there is no technique that gets rid of even most of your blemishes in less than a month.
However, if you are patient, you can use a combination of microdermabrasion cloths and microdermabrasion crystals to smooth out your skin, along with glycolic acid and salicylic acid peels to stimulate growth of new healthy skin. You can find all the products you need for these procedures at Exposed Skin Care.
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