Things You Should Know About Alexandrite Laser Hair Removal

What is Alexandrite Laser Epilation?

Alexandrite laser epilation is one of the most commonly used light-based technologies in the field of medical aesthetics and dermatology for the long-term and permanent elimination of unwanted hair follicles. This system produces a monochromatic beam in the 755 nm spectrum using an alexandrite crystal. The produced beam has physical properties that are minimally absorbed by water and oxyhemoglobin in surrounding tissues and maximally absorbed by the melanin pigment in the hair follicle; thus, its tissue selectivity is extremely high.

• Wavelength: At 755 nm, it directly targets follicles in the upper and middle layers of the epidermis.
• Mechanism of Action: The light energy absorbed by the hair shaft turns into heat (photothermal) within milliseconds.
• Clinical Result: Coagulation of the papilla and germinal matrix cells that nourish the hair follicle.

How Does the Alexandrite Laser System Work?

The working logic of Alexandrite laser technology is based on the physical principle called “selective photothermolysis.” The concentrated light beam emitted from the device head targets the dark-colored pigment substances (melanin) in the hair structure and is transmitted down along the hair to the root bed in milliseconds. When the beam reaches the root, the temperature in the follicle rises to a level (approximately 65-70 degrees) that will disrupt the cell structure. The healthy skin tissue around the hair root is not affected by this temperature increase thanks to the short pulse duration and integrated cooling systems.

• Selective absorption of light energy by the dark-colored substances in the hair shaft.
• The absorbed light turning into heat energy and irreversibly drying out the reproductive cells in the root.
• The gas or air-blowing cooling system simultaneously calming the upper skin (epidermis).

For Which Skin Types is Alexandrite Laser Suitable?

The Alexandrite laser system is suitable especially for individuals with light, white, and wheatish skin tones classified as Fitzpatrick Skin Types I, II, and III. In these skin types, the melanin density in the epidermis (upper skin) is low; thus, laser beams can reach the target hair roots directly and without loss without being held on the skin surface. In dark or excessively tanned skin (Types V-VI), the melanin on the skin surface is very dense, so using this system is not preferred to avoid the risk of the beam accidentally heating the skin and causing spots.

In Which Hair Types is Alexandrite Laser More Effective?

The performance graph of Alexandrite laser is directly parallel to the thickness of the hair and the density of the color pigment (melanin) it contains. This system provides maximum clinical efficiency especially in black, dark brown, coarse, and prominent hair types; because the darker and thicker the hair, the higher the absorbed laser energy. On the other hand, in completely white, gray, red, or very fine yellow/quince hairs that contain almost no melanin pigment, it is biologically impossible for the system to provide permanent reduction because the beam cannot attach.

• Thick dark brown and black colored hairs (Maximum absorption)
• Non-hormonal, genetically based coarse terminal hairs
• In fine and weak hairs (such as facial area), it should be applied carefully due to triggering risk.

Is Alexandrite Laser Epilation Permanent?

Alexandrite laser epilation sessions performed with correct device calibration, expert application, and proper patient selection provide lifelong permanent destruction on the targeted hair roots. With this method, approved by the U.S. Food and Drug Administration (FDA) for “permanent hair reduction,” no new hair growth is observed from the destroyed roots. However, since there are thousands of dormant root cells in the resting phase (telogen) in the human body, these passive roots can become active in systemic changes such as pregnancy, menopause, or heavy hormonal medication use years later; this situation arises from the body’s new hair production mechanism, not from treatment failure.

• Hair follicles captured and destroyed in the active growth phase disappear permanently.
• The smoothness achieved after treatment is preserved for years unless there is a hormonal pathology.
• Single annual maintenance (reminder) sessions reinforce the permanence of the result.

Why is Alexandrite Laser Epilation Applied in Multiple Sessions?

The inability to complete laser epilation procedures in a single session is a completely biological necessity arising from the physiological growth phases of hairs (anagen, catagen, telogen). Only 15% to 20% of the hairs on the body are in the active growth (anagen) phase at the same time, and laser beams can only affect live roots in this phase. Other hairs in the resting or regression phase cannot fully transmit the beam to the root; therefore, it is necessary to wait for the passive hairs to enter the active growth phase over time and plan new sessions.

• Anagen Phase: It is the only phase where the hair is tightly attached to the root and melanin synthesis is most active.
• Session Intervals: Usually planned between 4 to 8 weeks depending on the area.
• Total Number of Sessions: An average of 6-8 sessions are required for ideal results in body areas.

What Should Be Considered Before Alexandrite Laser Epilation?

Preparation rules before the session must be meticulously followed to achieve the expected success from the sessions and to keep the procedure safety at the maximum level. First of all, all traditional methods that remove hair from the root, such as tweezing, waxing, epilator, threading, or depilatory creams, must be completely abandoned at least one month before the procedure day. The hair root remaining intact inside the follicle is the primary condition for the laser beam to find its target. Additionally, the skin must be in its natural color tone and free from active sun exposure.

• Hairs should not be removed from the root in the last 4 weeks before the appointment; they should only be shortened from the surface.
• Use of acid-containing products with peeling properties (AHA, BHA, Retinol) should be stopped 1 week before.
• There should be no makeup, deodorant, cream, or oil residue in the area to be treated; the skin should be clean.

Does Sunbathing Affect Treatment Planning?

Sunbathing, using a solarium, or prolonged unprotected exposure to ultraviolet (UV) rays is a factor that directly changes or delays Alexandrite laser epilation treatment planning. UV rays trigger the skin’s defense system, leading to a melanin (color pigment) explosion in the upper skin; this means artificial tanning of the skin. Alexandrite laser shots applied on tanned skin cause the energy to be absorbed by the melanin on the skin surface instead of the hair root, resulting in heat damage, blistering, and risk of permanent white/dark spotting on the skin.

Do Medications Used Affect Laser Epilation?

Yes, many medication groups that the patient uses regularly or acutely due to systemic conditions can directly affect laser sessions by increasing the skin’s sensitivity to light (photosensitization). Especially isotretinoin-containing medications used in acne treatment (Roaccutane etc.), some tetracycline group antibiotics, corticosteroid derivatives, and painkillers thin the skin’s barrier tissue and make it overly sensitive to laser energy. The use of such medications must be reported to medical specialists before the session and treatment should be paused if necessary.

• No laser is performed during the use of systemic acne medications and for the first 6 months after the medication ends.
• Sessions for people using light-sensitive antibiotics are postponed to 1 week after the medication ends.
• Hormone or immune medications used for chronic conditions are evaluated under physician supervision.

Why is Skin and Hair Analysis Important?

Performing a comprehensive skin and hair analysis in the first stage, instead of starting laser epilation sessions with direct shots, is of vital importance for both the safety and effectiveness of the application. Every individual’s hair thickness, root depth, hair density, and skin moisture/color profile are completely different; even the hair character in the leg area and arm or face area of the same individual is not the same. Through the analysis performed, the phase and structure of the hair are determined, and the doses at which the device will be operated are mathematically clarified.

• Correct determination of the skin’s burning tolerance (minimal erythema dose).
• Selection of the correct millisecond (pulse width) setting according to the hair’s depth.
• Prevention of hairs becoming resistant by thinning due to unnecessary low-dose shots (paradoxical hypertrichosis).

What Kind of Sensation May Occur During the Procedure?

The sensation felt by patients during an Alexandrite laser epilation session varies depending on personal pain threshold and the nerve ending density of the treated area. In general clinical experience, this sensation is described as a small and fast rubber band snap on the skin or a very light pinprick. Integrated cryogen gas spraying or continuous cold air blowing technologies in modern devices cool the skin surface to an anesthetic level (up to -20 degrees) at the moment of the shot, making the procedure quite comfortable and tolerable.

• It is normal to feel a slight, momentary heat and pricking sensation at the moment of the shot.
• The sensation may be slightly more pronounced in bony areas (shinbone, upper bikini line).
• The sensation is stronger in the first sessions when hairs are dense and thick, and comfort increases as hairs decrease.

What Should Be Considered After Alexandrite Laser Epilation?

After the laser epilation session is successfully completed, post-op (after-procedure) care rules should be followed so that the skin can repair itself quickly and be protected against external factors. The formation of mild redness, swelling, and warmth (perifollicular erythema) around the hair follicles in the treated areas is a normal and healthy tissue response indicating that the energy has reached the root. In this sensitive period, all aggressive applications that will tire, irritate, or clog the pores of the skin should be avoided.

• The treated areas should not come into contact with hot water for the first 24 hours; lukewarm showers should be preferred.
• Perfume, deodorant, or alcohol-containing toners should not be applied to the area for the first 48 hours after the session.
• Intensive moisturizing and repairing creams should be used for a few days after the session to support the skin barrier.

How Should Hair Be Removed Between Sessions?

The approach to hairs entering the shedding phase or newly emerging during the one-month waiting period between laser epilation sessions is very important. Within 10 to 21 days after the session, hairs whose roots have been damaged will grow toward the skin surface and shed spontaneously; during this process, hairs should not be pulled by hand but left to shed. For hairs that regrow or do not shed between sessions, tweezers, wax, or epilator machines with tweezers should definitely not be used; only surface shaving or shortening methods should be chosen.

Does It Help Reduce Ingrown Hairs?

Alexandrite laser epilation is accepted as the most effective solution method in medical literature, especially for the treatment of ingrown hairs (folliculitis) and ingrown hair problems that have become a chronic issue in the legs and bikini areas. The ingrown hair problem occurs when the hair cannot pass the skin surface, grows under the skin, and creates a foreign body reaction there, forming inflamed pimples. Alexandrite laser beams directly reach the root of this ingrown hair under the skin and stop the production mechanism there; as the root dries, the ingrown hair is expelled by the body and the skin becomes smooth.

• Permanent breaking of the faulty growth and ingrown cycle triggered by waxing and tweezing.
• Healing of inflamed nodules and infection foci in ingrown areas.

For Whom Might Alexandrite Laser Epilation Not Be Suitable?

Although Alexandrite laser epilation is a safe non-surgical aesthetic procedure, it may be inconvenient or inefficient in some medical and systemic conditions. For example, it can be triggering in chronic skin diseases such as psoriasis or vitiligo that show the Koebner phenomenon (i.e., producing new lesions with mechanical/thermal trauma on the skin). In addition, the system cannot function physically in albino patients who do not have hair pigment to absorb light or in individuals with completely whitened hairs due to old age.

• Women in pregnancy due to developmental processes and lack of clinical data.
• Those with open wounds, active eczema, fungal, or herpes infections in the application area.
• Uncontrolled epilepsy patients with light-triggered seizure risk.

What Are the Differences Between Alexandrite Laser and Diode Laser?

The most basic technical difference between Alexandrite laser and Diode laser is their physical wavelengths and the absorption/propagation characteristics of these wavelengths in tissue. Alexandrite laser operates at 755 nm wavelength and provides fast results on light skin by binding to melanin at a very high level; shots are made remotely without contacting the skin. Diode laser has an 810 nm wavelength, can penetrate deeper into the tissue, and has a slightly lower attachment rate to melanin compared to Alexandrite; thus, it works in a safer profile without causing burn risk in dark and tanned skin.

What Are the Differences Between Alexandrite Laser and Nd:YAG Laser?

Nd:YAG laser systems produce a 1064 nm wavelength and are the systems that can reach the deepest layers of the skin among epilation technologies. While Alexandrite laser directly targets the color substance (melanin) in the hair shaft; Nd:YAG laser largely bypasses melanin and targets the capillary network (papilla) that nourishes the hair root at a microscopic level. Due to this strategic difference, Nd:YAG lasers can be used even in the darkest and black skin types without burning the upper skin at all; however, due to their low selectivity to melanin, they may not provide as comfortable and fast results as Alexandrite in light-skinned individuals.

• Alexandrite is preferred in light skin-dark hair combination; Nd:YAG is the primary choice in very dark tanned skin.
• Nd:YAG lasers have deeper penetration but the shot sensation is more painful compared to Alexandrite systems.

How is the Right Laser Technology Determined?

Determining the right laser technology to achieve clinical success is done by a specialist evaluating completely objective medical criteria, not with popular information read from the internet. It may not always be possible to finish all hairs on a person’s body with a single device; because while thick hairs are destroyed with Alexandrite laser in the first sessions, a transition to Diode laser system may be needed for thinned hairs in the last sessions. Therefore, the most correct technology consists of personalized combinations that are flexibly revised according to the area and the current phase of the hair.

• Exact determination of the skin’s place in the Fitzpatrick scale during the first examination.
• Detection of hair root depths and hormonal sensitivity risks (e.g., facial area).
• Updating device parameters by monitoring changes in hair structure as treatment sessions progress.

Who Are We? | Demiderm Polyclinic Medical Aesthetic Services

Demiderm Polyclinic is a modern healthcare institution approved by the Ministry of Health that has adopted the vision of bringing international standards in the fields of aesthetics, dermatology, and laser technologies to Turkey since its establishment. Thanks to the original and FDA-approved Alexandrite, Diode, and Nd:YAG laser platforms we have in our institution, we can offer completely “hybrid” treatment models suitable for each patient’s own hair and skin biology without being dependent on a single device. All our epilation and medical aesthetic processes are carried out by our expert physicians and certified medical staff, observing the principles of full sterilization and maximum patient comfort. As Demiderm, our goal is to provide our patients with permanent and satisfaction-oriented results in the safest conditions without compromising on scientific facts and ethical rules.