Can Laser Hair Removal Stimulate Hair Growth?
It Sounds Strange — But Is It Possible?
Laser hair removal is meant to reduce or eliminate hair, so it may sound surprising to hear that in rare cases, it might appear to do the opposite. Let’s explore whether laser hair removal can actually stimulate hair growth and what you need to know.
What Is Paradoxical Hypertrichosis?
This is a rare phenomenon where laser treatment appears to trigger more hair growth in the treated area. It’s called paradoxical hypertrichosis — and although it’s uncommon, it has been documented in clinical studies.
What Does It Look Like?
Instead of becoming thinner or sparser, new fine hairs can begin to grow in or near the treatment area. These hairs might be softer, lighter, or “vellus-like” — the kind of hair we normally associate with peach fuzz.
How Common Is It?
Paradoxical hypertrichosis is extremely rare, with studies suggesting it affects less than 1% of patients. It’s more likely to occur in certain cases, particularly when:
- Inappropriate laser settings are used
- The person has darker skin or finer hair
- Hair is not fully targeted due to being too light
Why Might It Happen?
The theory is that instead of destroying the hair follicle, the laser may slightly heat it without damaging it, which could potentially stimulate it to grow. Think of it like “waking up” a dormant follicle instead of disabling it — but again, this is rare.
Who Is at Risk?
The risk is higher for people with:
- Hormonal imbalances (like PCOS)
- Dark or tanned skin being treated with incorrect wavelengths
- Very fine hair that doesn’t absorb laser energy well
That’s why a thorough consultation and patch test are essential before starting a treatment course.
How to Minimise the Risk
- Choose a reputable clinic with trained laser specialists
- Ensure they use the correct laser type for your skin and hair
- Avoid sun exposure or tanning before and after treatment
- Stick to your treatment plan and don’t skip sessions
What to Do If It Happens
If you suspect increased hair growth after laser treatment, don’t panic. Here’s what we’d recommend:
- Book a review – We’ll assess the area and determine whether it’s regrowth, new hair, or temporary irritation.
- Adjust settings – Sometimes a different wavelength or setting can fix the issue.
- Consider switching lasers – At Renew, we have multiple laser technologies to suit different needs.
Can It Be Reversed?
Yes — if increased hair growth occurs, continued treatment with proper settings usually eliminates the new hair. With the right adjustments, the laser can still target and destroy those follicles effectively.
Other Conditions That Might Be Mistaken for Stimulated Growth
Sometimes, what looks like new hair growth might actually be:
- Hair regrowth between sessions
- Hormonal hair growth unrelated to treatment
- Shaving regrowth — hair may appear thicker when it’s blunt-cut from shaving
Final Thoughts
While it’s technically possible for laser hair removal to stimulate hair growth, it’s very rare and usually correctable. Choosing an experienced provider with the right equipment dramatically reduces the risk.
Worried about side effects? Book a free consultation at Renew – Specialist Laser Clinic and let’s talk through any concerns. Your safety and confidence are our top priorities.
