Laser Hair Removal in NYC

Laser hair removal works through a principle called selective photothermolysis — a term that sounds complex but describes a straightforward biological process. The laser emits a specific wavelength of light — either 805 nanometers or 1060 nanometers in our LightSheer QUATTRO system, depending on the patient’s skin type — that is preferentially absorbed by melanin, the dark pigment concentrated in hair follicles. When this light energy converts to heat within the follicle, it damages the follicular stem cells responsible for producing new hair growth, ultimately achieving permanent hair reduction. The surrounding skin, which contains far less concentrated melanin, absorbs minimal energy and remains unharmed.

“One of the most important things I explain to patients during their consultation is why multiple sessions are necessary — and it comes down to basic hair biology,” says Arash Akhavan, MD. “At any given time, only about 20 to 25 percent of your hair follicles are in the active anagen growth phase, which is the only phase where the laser can effectively target and destroy the follicle. The remaining follicles are in catagen or telogen — resting and shedding phases — where there isn’t enough melanin present for the laser to work. That’s why we space treatments approximately six weeks apart: to catch each new cycle of follicles as they rotate into their vulnerable growth phase.”

This biological reality is why a full course of treatment typically requires six to eight sessions for most patients with light-to-medium skin and dark, coarse hair. Patients with lighter or finer hair, darker skin tones, or hormonally influenced areas like the face and shoulders may need additional sessions and ongoing maintenance treatments as new follicles develop over time. Dr. Arash Akhavan assesses your individual hair growth patterns at each visit and adjusts the treatment plan accordingly — something that simply cannot happen at a clinic where a technician follows a standardized protocol for every patient who walks in.

The distinction between a board-certified dermatologist calibrating your laser versus a certified laser technician following preset parameters is not a marketing talking point — it is the difference between treatment that accounts for your individual skin biology and treatment that doesn’t. Dermatologists complete four years of medical school followed by a rigorous residency focused on skin anatomy, physiology, and pathology. They understand how melanin distribution varies across skin types, how hormonal fluctuations affect hair growth cycles, and how medications like isotretinoin or certain antibiotics can make the skin dangerously photosensitive. A 2019 study published in Dermatologic Surgery found that adverse events from laser hair removal — including burns, scarring, and paradoxical hypertrichosis — were significantly more common when treatments were performed in non-physician-supervised settings.

The Consultation

Your laser hair removal journey at our Manhattan dermatology practice begins with a one-on-one consultation with Dr. Arash Akhavan. During this visit, he examines your treatment areas, evaluates your skin type on the Fitzpatrick Scale, reviews your medical history for any contraindications, and discusses your goals and expectations candidly. You’ll learn exactly which laser settings will be used for your skin type, how many sessions to expect, and what realistic outcomes look like for your specific hair and skin combination. There is never any pressure — the consultation is an educational conversation, and Arash Akhavan, MD believes every patient deserves complete transparency before committing to a treatment plan.

Preparing for Your Session

Preparation is straightforward but important for both safety and results:

• Shave the treatment area the night before your appointment. The hair shaft above the skin must be removed so the laser energy travels down to the follicle rather than being absorbed by surface hair — which can cause painful singeing and reduce effectiveness.
• Avoid sun exposure and tanning for at least two to four weeks before treatment. Recent UV exposure stimulates melanin production in the epidermis, reducing the contrast between skin and follicle and increasing the risk of burns.
• Discontinue waxing, plucking, and threading at least four to six weeks prior. These methods remove the hair root entirely, leaving the laser with no target. Shaving is the only acceptable hair removal method between sessions.
• Disclose all medications at your consultation — particularly isotretinoin (Accutane), photosensitizing antibiotics, and topical retinoids, which can make skin dangerously reactive to laser energy.

During the Procedure

“Patients are often surprised at how fast the actual treatment goes,” says Dr. Arash Akhavan. “For larger areas like the legs, I use the QUATTRO’s vacuum-assisted applicator, which gently pulls the skin taut, brings the follicles closer to the surface, and delivers the laser pulse in one motion — most patients describe it as a quick, warm snapping sensation, far less painful than waxing. Full legs are typically done in about 20 to 30 minutes. For smaller, more sensitive areas like the upper lip, bikini, underarms, or areolas, I switch to the cool-tipped applicator, which provides precise, comfortable treatment with integrated contact cooling.”

Both applicator types feature built-in cooling technology that keeps the skin’s surface temperature low throughout the procedure, providing continuous comfort without the need for topical numbing in most treatment areas. For particularly sensitive zones like the bikini line, we can apply a topical anesthetic beforehand — though most patients find this unnecessary after their first session.

After Your Session

Immediately following treatment, mild erythema (redness) and perifollicular edema (small raised bumps around each follicle, similar in appearance to goosebumps) are normal and expected. These are actually signs of an effective treatment — they indicate the laser energy successfully reached the follicles. These effects typically resolve within a few hours to one day.

In the one to three weeks following your session, you’ll notice the treated hairs gradually shedding. This sometimes looks like new growth, but it’s not — the destroyed follicles are simply pushing the dead hair shafts out from beneath the skin. Gentle exfoliation can help this process, but do not pluck or tweeze shedding hairs, as this disrupts the natural elimination process.

After treatment, avoid excessive heat for 24 to 48 hours — hot showers, saunas, steam rooms, and intense exercise can aggravate the treated skin. Apply a gentle, fragrance-free moisturizer or pure aloe vera if the area feels warm. Broad-spectrum sunscreen (SPF 30 or higher) is essential on any treated areas exposed to sunlight.