Laser Hair Reduction

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Laser hair reduction is used to reduce unwanted hair. Common treatment locations include legs, armpits, upper lip, chin and the bikini line. However, it's possible to treat unwanted hair in nearly any area, except the eyelid or surrounding area.

Hair color and skin type influence the success of laser hair removal. The basic principle is that the pigment of the hair, but not the pigment of the skin, should absorb the light. The laser should damage only the hair follicle while avoiding damage to the skin. Therefore, a contrast between hair and skin color — dark hair and light skin — results in the best outcomes.

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The risk of damage to skin is greater when there is little contrast between hair and skin color, but advances in laser technology have made laser hair removal an option for people who have darker skin. Laser hair removal is less effective for hair colors that don't absorb light well: gray, red, blond and white. However, laser treatment options for light-colored hair continue to be developed.

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Risks of side effects vary with skin type, hair color, treatment plan and adherence to pre-treatment and post-treatment care. The most common side effects of laser hair removal include:

• Skin irritation. Temporary discomfort, redness and swelling are possible after laser hair removal. Any signs and symptoms typically disappear within several hours.

• Pigment changes. Laser hair removal might darken or lighten the affected skin, usually temporarily. Skin lightening primarily affects those who don't avoid sun exposure before or after treatment and those who have darker skin.

 

Rarely, laser hair removal can cause blistering, crusting, scarring or other changes in skin texture. Other rare side effects include graying of treated hair or excessive hair growth around treated areas, particularly on darker skin.

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Laser hair removal isn't recommended for eyelids, eyebrows or surrounding areas, due to the possibility of severe eye injury.

 

How do I Prepare?

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Before laser hair reduction, schedule a consultation with the doctor to determine if this is an appropriate treatment option for you. Your provider will likely do the following:

• Review your medical history, including medication use, history of skin disorders or scarring, and past hair removal procedures

• Discuss risks, benefits and expectations, including what laser hair reduction can and can't do for you

• Take photos to be used for before-and-after assessments and long-term reviews

At the consultation, discuss a treatment plan and related costs. 

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The doctor also will offer specific instructions to prepare for laser hair removal. These might include:

• Staying out of the sun. Follow your doctor's advice for avoiding sun exposure, usually up to six weeks before treatment, and use a broad-spectrum sunscreen daily.

• Lightening your skin. Avoid any sunless skin creams that darken your skin. Your doctor also might prescribe a skin bleaching cream if you have a recent tan or darker skin.

• Avoiding other hair removal methods. Plucking, waxing and electrolysis can disturb the hair follicle and should be avoided at least four weeks before treatment.

• Avoiding blood-thinning medications. Ask your doctor about what medications, such as aspirin or anti-inflammatory drugs, to avoid before the procedure.

• Shaving treatment area. Trimming and shaving is recommended the day before laser treatment. It removes hair above the skin that can result in surface skin damage from burnt hairs, but it leaves the hair shaft intact below the surface.

 

What can I expect?

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Laser hair removal usually requires a series up to six treatments. The interval between treatments will vary depending on the location. On areas where hair grows quickly, such as the upper lip, the treatment might be repeated in four to eight weeks. On areas of slow hair growth, such as the back, the treatment might be every 12 to 16 weeks.

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For each treatment you'll wear special goggles to protect your eyes from the laser beam.

The provider will apply a topical anesthetic to your skin to reduce any discomfort during treatment and may use a cryo air cooling machine. 

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After the Procedure

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You might notice redness and swelling for the first few hours after laser hair removal.

To reduce any discomfort, apply ice to the treated area. 

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After laser hair reduction and between scheduled treatments, avoid sun exposure — both natural sunlight and tanning beds — for six weeks or as directed by your doctor. Use a broad-spectrum sunscreen daily.

 

Results

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Hairs do not fall out immediately, but you will shed them over a period of days to weeks. This may look like continued hair growth. The repeated treatments are usually necessary because hair growth and loss naturally occur in a cycle, and laser treatment works best with hair follicles in the new-growth stage.

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Results vary significantly and are difficult to predict. Most people experience hair removal that lasts several months, and it might last for years, but laser hair reduction doesn't guarantee permanent hair removal. When hair regrows, it's usually finer and lighter in color. You might need maintenance laser treatments for long-term hair reduction.