Experiencing hair regrowth after laser hair removal can be frustrating, but it doesn’t mean the treatment has failed. Laser hair removal is a clinically proven method for long-term hair reduction—not instant or permanent hair removal. Some regrowth is normal, particularly in the early stages, because the treatment works progressively and relies on targeting hair follicles over multiple sessions. Understanding this distinction helps set realistic expectations and supports better long-term results.
How Laser Hair Removal Works
Laser hair removal targets melanin, the pigment in the hair follicle. The laser energy converts to heat, damaging the follicle and reducing its ability to produce new hair. The treatment is most effective when the hair is in the active growth phase (anagen), when the follicle contains the highest concentration of pigment and blood supply. Since only a portion of hairs are in this phase at any given time, multiple sessions are essential to achieve lasting hair reduction.
Why Hair Grows Back After Laser Hair Reduction
Hair Not in the Active Growth Phase
As mentioned, laser energy is only effective on hair in the anagen phase. At any given time, only about 10–30% of hairs are actively growing, meaning many follicles will not respond during a single session. Hairs treated outside this phase may shed initially but can regrow later, which is why carefully timed, multiple sessions are critical for successful hair reduction.
Hormonal Influences on Hair Regrowth
Hormones play a major role in hair growth, and fluctuations can trigger new hair formation even after successful laser treatments. Conditions such as polycystic ovarian syndrome (PCOS), thyroid imbalance, pregnancy, menopause, or certain hormonal medications can activate previously dormant follicles. In these cases, hair regrowth reflects the body’s internal hormonal response rather than treatment failure.
Incorrect Laser Settings
Laser settings that are too conservative may fail to deliver enough energy to disable the follicle fully. While hair may appear reduced initially, inadequate energy, pulse duration, or improper timing can allow follicles to recover over time. Correct calibration of the laser parameters, combined with clinician skill and experience, is essential for long-term results and safe treatment.
Hair Colour and Thickness
Laser hair removal works best on dark, coarse hair due to its higher melanin content. Fine, light, blonde, red, or vellus hairs absorb less laser energy, meaning they respond more slowly or show limited reduction. In clinical practice, areas with fine vellus hair, such as the upper lip, may require more sessions compared with coarser hair areas like the underarms.
Inconsistent Treatment Schedule
Adhering to a consistent treatment schedule is critical for cumulative hair reduction. Spacing sessions too far apart or missing appointments allows untreated follicles to re-enter the active growth phase, resetting progress. The ideal interval varies depending on the treated area and hair growth cycle, which is why personalised scheduling is key for optimal outcomes.
Incorrect Technology for Skin or Hair Type
Not all laser technologies suit every skin tone or hair type. Using the wrong system can result in insufficient follicle damage and higher regrowth rates. Choosing the appropriate laser and wavelength and adjusting treatment protocols ensures effective energy delivery while protecting the skin. A therapist’s skill and experience are crucial for selecting the right technology for each client.
Hormonal changes affect laser hair reduction
Hormonal imbalances — including PCOS, thyroid issues, pregnancy, or stress-related hormone fluctuations — can stimulate new hair growth. In these cases, laser hair regrowth is not a failure of the treatment but a response from the body.
Hair colour and skin tone matter
Laser works best on darker hair with sufficient pigment. Very light, blonde, red, or grey hairs may not absorb enough energy, which can lead to reduced results and visible hair growing back after laser sessions. Clients with fair skin and dark, coarse hair are typically the best candidates for laser hair reduction, as the contrast between skin and hair allows the laser to target follicles most effectively.
Incorrect laser settings or outdated devices
Not all lasers are created equal. Using incorrect energy levels or outdated technology can limit effectiveness. Treatments with low energy may feel comfortable during the session but often fail to achieve long-term hair reduction. Proper energy levels, pulse duration, and treatment intervals are essential—and this is where the skill and experience of a trained clinician make a significant difference.
Inconsistent Sessions or Poor Aftercare
Maintaining a consistent treatment schedule is crucial for achieving long-term hair reduction. Skipping sessions or spacing them too far apart can disrupt progress, as untreated follicles may re-enter the active growth phase. Proper aftercare is equally important—avoiding any hair removal methods that remove hair from the root, such as waxing or epilation, between sessions ensures the laser can target follicles effectively. Neglecting these steps can reduce results and slow overall progress.
How to Improve Laser Hair Removal Results
Personalised Treatment Plan
Laser hair removal should be tailored to each individual’s skin type, hair colour, and growth cycle. Adjusting session intervals and the number of treatments based on your specific hair growth pattern can significantly improve outcomes. In my experience, clients who have undergone multiple sessions at busy clinics using fixed settings often see inconsistent results.
Choosing the Right Laser Technology
Modern laser systems offer deeper follicle targeting, improved safety, and adaptability across different skin tones. For example, clients with darker skin may require longer-wavelength lasers for safe and effective results. The right technology plays a vital role in achieving consistent, long-term hair reduction.
Ongoing Progress Review and Adjustment
Laser hair removal is not a one-size-fits-all treatment. As hair density and thickness change, treatment settings must be adapted to continue effectively targeting follicles. Therapist experience and clinical judgement are essential for these adjustments, and investing in professional care can save time and sessions in the long run.
Addressing Hormonal Factors
For hormonally driven hair growth, laser treatments may be combined with long-term management strategies. For example, I’ve treated clients who noticed increased hair growth after hormone replacement therapy (HRT) on areas that previously had minimal hair. In such cases, laser treatment was combined with medical guidance from their GP to manage hormonal influences for lasting results.
Laser Hair Removal at Medix Skincare and Laser Clinic in Melbourne
At Medix Skincare & Laser Clinic in Melbourne, laser hair removal is performed by experienced clinicians who customise settings for your skin and hair type. Treatments are adjusted over time based on individual response, ensuring safety, consistency, and realistic, long-term hair reduction. Our focus is always on achieving effective results while protecting your skin’s integrity.
If you’re experiencing inconsistent results or hair regrowth after laser, a tailored approach can make all the difference. Book a consultation today to create a personalised laser hair removal plan designed for your skin, your hair, and your long-term goals.
Contact Us:
- 📞 03 9686 0003
- 📍 1/367A Centre Road, Bentleigh VIC 3204
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Disclaimer
Results may vary. This content is for educational purposes only and does not replace professional consultation or medical advice.
