Understanding the Side Effects of Laser Hair Removal

Laser hair removal can feel like a dream come true—no more constant shaving or waxing— especially when you want to be hair-free for special occasions. But before jumping into the procedure, it’s essential to know that side effects, although mostly rare, can happen.

Around 80% of people experience redness or swelling right after the treatment, but it usually goes away in a day or two. Serious issues like blisters or skin changes are quite uncommon, happening in less than 1% of cases when done by a professional (Lanigan, n.d.).  Knowing this can help you decide if it’s the right choice for you!

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How Laser Hair Removal Works

Laser hair removal relies on the interaction between light energy and melanin, the natural pigment found in hair. During the procedure, the light energy is absorbed by the melanin in the hair shaft and converted into heat. This thermal energy travels down the hair shaft to the hair follicle, damaging the structures responsible for hair growth. 

Laser hair removal works for all skin types and hair textures, so anyone can try it. It’s most effective on light skin with dark hair because the contrast makes it easier for the laser to target the hair follicles. You might need a few extra sessions to see the best results if you don’t have this combination.

On the other hand, some people are not advisable to undergo laser hair removal treatment, specifically:

• Pregnant women
• Those who take photosensitising medications that can make the skin overly sensitive to light.
• Those with active skin conditions like eczema, psoriasis, or infections in the area to be treated.
• Those with recently tanned skin increase the risk of burns or discolouration.

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Common Side Effects

✷ Redness

Redness is one of the most common side effects and usually appears right after the procedure. It happens because the laser targets your hair follicles, leaving the skin feeling a little sensitive or flushed, like a mild sunburn.

✷ Swelling

Swelling around the hair follicles is another typical reaction. It’s just your skin adjusting to the laser’s heat and is usually minor, disappearing quickly. Your doctor might suggest applying ice to the treated area to ease the swelling.

✷ Temporary Discomfort 

You might feel a mild stinging sensation during and right after the treatment. Most clinics use cooling gels or devices during the session to make it more comfortable.

✷ Dryness and Flaking

Some people notice their skin becomes dry or flaky as the body sheds the damaged hair follicles. Fortunately, this side effect doesn’t last long and can be managed with a gentle moisturiser to keep the skin hydrated.

✷ Itching

Mild itching is also common as the treated area heals. Similar to other common side effects, it doesn’t last long.

Rare Yet Serious Side Effects

✷ Burns and Blisters

Though these side effects are rare, they represent some of the most serious complications during laser hair removal. These usually occur when too much heat is applied to the skin, often due to incorrect laser settings or inadequate cooling during treatment.

✷ Scarring

While scarring remains a relatively rare complication, its potential for permanent impact makes it a significant concern in laser hair removal procedures. The risk of scarring can increase substantially when treatments are performed on areas with limited vascular supply or when excessive fluence is applied.

✷ Pigmentation

Changes in skin colour, like dark spots (hyperpigmentation) or light spots (hypopigmentation), are rare but can happen after treatment. Hyperpigmentation is more common, especially in people with darker skin tones. These changes may appear weeks or months later and can be tricky to manage.

Read: Laser Treatment For Hair Removal: How It Works & What To Expect

Tips in Minimizing Side Effects: Dos and Don’ts

✷ DOs

1. Choose a Qualified Professional. The foundation of safe laser hair removal begins with choosing an appropriately qualified and experienced practitioner. A skilled specialist should possess comprehensive training in laser physics, skin anatomy, and the complexities of hair growth patterns, as Dr Anita Soosay of The Aesthetics Centre does.
2. Follow Pre- and Post-Treatment Care.: Stick to the care instructions provided by your clinic. Pre-treatment care may include shaving the area to be treated in advance and keeping it clean. Meanwhile, post-treatment care involves applying sunscreen and keeping it moisturised. Treatment care may vary depending on your needs, so it is crucial to take note of the advice given by your doctor.
3. Apply Sunscreen. Sun protection is a must when it comes to laser hair removal. Stay out of the sun for at least two weeks before and after your session. If you need to be outside, apply sunscreen with SPF 30 or higher and use hats or protective clothing to shield your skin. This step helps prevent pigmentation issues and keeps your skin healthy.

✷ DONTs

1. Don’t Skip the Patch Test. The foundation of safe laser hair removal begins with proper preliminary testing. A patch test is an essential safety measure, providing valuable insights into how an individual’s skin will respond to the treatment.
2. Don’t Wax, Pluck, or Thread Before Treatment. Research demonstrates that waxing, plucking, or threading must be avoided for at least four to six weeks before treatment. This restriction exists because laser technology specifically targets the pigment in hair follicles, requiring the root to remain in place for optimal results.
3. Don’t Expose Your Skin to the Sun. Clinical evidence strongly suggests avoiding sun exposure for at least two weeks before and after laser treatment.  Sun exposure can increase skin sensitivity and alter melanin production, potentially leading to adverse reactions during treatment.
4. Don’t Use Harsh Skincare Products.  Patients must avoid harsh skincare products, particularly those containing active ingredients such as retinoids, glycolic acid, or salicylic acid. These products can increase skin sensitivity and potentially lead to adverse reactions during treatment.

Read: Exploring the Versatility & Benefits of Laser Hair Removal

FAQ on Laser Hair Removal Side Effects

1. Will I experience scarring after laser hair removal?

Clinical studies show that the chance of permanent scarring is very low when a qualified professional removes laser hair. However, the risk increases if inexperienced practitioners perform treatments or aftercare instructions aren’t followed. Scarring usually happens when there’s an excessive reaction to the skin, often due to improper laser settings or not using cooling mechanisms during treatment.

2. Can I still exercise after treatment?

It’s recommended to avoid intense exercise for at least 24-48 hours after your treatment. This is because sweating and raised body temperature can irritate the treated area, which could lead to inflammation or other reactions. Also, avoid activities that might cause friction on the treated skin during the first few days.

3. Are there any long-term side effects?

The short answer is “no.” Laser hair removal is generally considered safe, and long-term side effects are rare. While some temporary redness or irritation is common immediately after treatment, these typically subside quickly.  Extensive research and years of clinical use show no evidence of long-term health risks associated with laser hair removal.

4. Can I avoid side effects?

Yes! Most side effects can be prevented or minimised by carefully preparing well, choosing a qualified practitioner, and following the aftercare guidelines. By understanding the risks and knowing when to seek help, you can enjoy a safer and more successful treatment.

5. When should I seek medical advice?

If you experience severe pain, blisters, or unusual changes in your skin, it’s essential to reach out to your healthcare provider immediately. Also, look for signs of infection, persistent redness, or swelling—these should be professionally evaluated.

Read: FAQs About Hair Removal You Should Know

Dr. Anita Soosay has more than 20 years of specialised experience in aesthetic medicine. Her expertise in laser treatments makes her qualified to address any concerns or complications that may arise during your hair removal journey. Her comprehensive knowledge spans multiple laser technologies, including CO2 laser, Q-switched Nd-YAG, long-pulsed Nd-YAG, Diode, and Copper Bromide lasers.

Are you ready to take the next step towards laser hair removal? Book your consultation with us today by calling +65 6820 3308 or +65 6820 3309, or reach us at WhatsApp at +65 8139 6112.