Aesthetic Insights · 2026
Laser Hair Removal: Essential Before & After Care
Preparing your skin properly and caring for it afterward, the key to safe, effective laser hair removal results.
10 min read · Updated 2026
Getting great results from laser hair removal is not just about the technology or the practitioner, it is also about how you prepare your skin before each session and how you care for it afterward. Proper preparation maximises effectiveness and minimises side effects. At Reimagine Clinic in Montreal, we have seen firsthand that patients who follow these guidelines consistently get better results, fewer complications, and a smoother overall experience. This guide covers everything you need to know.
Before Your Session: Weeks in Advance
4 to 6 weeks before: Stop waxing, plucking, threading, and epilating. These methods remove the hair root, and the laser needs that root intact to work. Shaving is perfectly fine and actually encouraged, it removes surface hair without disturbing the follicle. If you have been using dermaplaning for facial hair, switch to shaving in the treatment zone only.
2 to 4 weeks before: Avoid direct sun exposure and tanning beds on the treatment area. Tanned skin increases the risk of burns and hyperpigmentation. If you are treating exposed areas like arms or legs during summer in Montreal, use SPF 50+ daily. This is especially important for those prone to sun damage.
1 to 2 weeks before: Discontinue retinoids, glycolic acid, and any photosensitising medications. Check with your provider about any prescription medications. If you are unsure about your skin’s readiness, a professional skin analysis can assess your current skin condition and confirm you are safe to proceed.
PDRN's original approved use chronic wound healing in damaged tissue operates under very different biological conditions than applying the compound to healthy skin for cosmetic improvement. Extrapolating wound-healing data to anti-aging claims is a significant scientific leap that has not been validated in large, well-controlled clinical trials.
Day-of Preparation
Shave the treatment area: Ideally shave the night before or the morning of your appointment. The laser targets pigment in the hair follicle beneath the skin, surface hair absorbs laser energy and can cause burns. A clean shave ensures all the energy reaches the root where it belongs.
Clean skin only: Arrive with the treatment area free of lotions, deodorant, sunscreen, and makeup. Any residue on the skin can interfere with laser energy absorption or cause irritation. Cleanse the area with a gentle, fragrance-free wash before your appointment.
Dress comfortably: Wear loose clothing over the treatment area. Tight fabrics can irritate freshly treated skin. For bikini area treatments, cotton underwear is recommended. Avoid caffeine and heavy exercise before your session, as both can increase skin sensitivity and blood flow to the area.
What if I forget to shave?
Your practitioner can shave the area at the clinic, but it is better to do it yourself the night before so any minor razor irritation has time to settle. Arriving unshaved may also shorten the time available for actual treatment.
Can I take painkillers before the session?
Paracetamol (Tylenol) is fine 30 minutes before your session. Avoid ibuprofen and aspirin as they are blood thinners and can increase bruising risk. Numbing cream can be applied for sensitive areas, ask your clinic about this option.
Injectable PDRN products are not approved by the FDA in the United States or by Health Canada for cosmetic applications. This means there has been no independent regulatory verification of safety, efficacy, or manufacturing quality for aesthetic injectable use. Without regulatory approval, there is no guarantee of product sterility, consistent concentration, or purity all critical factors when a substance is being injected into your skin.
What Happens During the Treatment
Understanding what happens during the session helps you prepare mentally and physically. Your practitioner will start by assessing your skin and hair, confirming settings based on your skin type, hair colour, and the area being treated. For patients with darker skin tones, specific wavelengths and settings are used to ensure safety and effectiveness.
The laser emits concentrated light that is absorbed by melanin in the hair follicle. This generates heat that damages the follicle without harming surrounding tissue. Modern systems include built-in cooling, either a chilled tip, cryogen spray, or cold air, that protects the skin surface and dramatically reduces discomfort.
Session duration depends on the treatment area. Upper lip takes about 5 minutes. Underarms take 10 to 15 minutes. Full legs can take 45 to 60 minutes. Bikini varies from 15 to 30 minutes depending on the extent. You will feel a snapping sensation with each pulse, most patients describe it as very tolerable. For a comprehensive overview of the treatment itself, our comprehensive laser hair removal guide covers types, safety, and effectiveness in detail.
PDRN is not without scientific interest the underlying biology of adenosine receptor activation and tissue repair is legitimate. However, the gap between promising preclinical data and proven clinical efficacy for aesthetic use remains wide. The current state of evidence does not support PDRN as a reliable, first-line treatment for skin rejuvenation. The studies are too small, too inconsistent, and too often conflicted to draw confident conclusions about how well it works, how long results last, or how it compares to established treatments.
Immediate Aftercare: The First 48 Hours
The first 48 hours after treatment are critical for healing and results. Redness and mild swelling around the follicles (perifollicular oedema) are completely normal, they actually indicate that the laser has effectively targeted the hair roots. Apply a soothing aloe vera gel or a gentle, fragrance-free moisturiser to calm the skin.
Avoid: Hot showers, saunas, steam rooms, and hot tubs for at least 48 hours. Heat aggravates treated skin and can cause prolonged redness or even blistering. Skip the gym for 24 to 48 hours as well, sweating on freshly treated skin can cause folliculitis (inflamed bumps). Keep treated skin out of direct sunlight and apply SPF 50+ if going outdoors.
Do not: Scratch, pick, or exfoliate the treated area. If you experience mild itching, cool compresses help. Avoid fragranced products, self-tanner, and active ingredients like retinol or AHAs. For full recovery instructions, follow our detailed laser hair removal aftercare page, which covers every stage of healing and what to expect week by week.
When can I shave again after treatment?
Wait at least 48 hours, or until redness has fully subsided. When you do shave, use a fresh razor and a gentle shaving cream. Never wax, pluck, or thread between sessions, shaving is the only option.
What about swimming or the beach?
Avoid pools (chlorine) and ocean water for at least 48 to 72 hours. Both can irritate treated skin. If heading outdoors, protect treated areas with clothing and SPF 50+, especially in Montreal’s bright summer months.
Long-Term Care Between Sessions
Sessions are typically spaced 4 to 8 weeks apart depending on the treatment area and hair growth cycle. Between sessions, consistent care keeps your skin in optimal condition for the next treatment. Sun protection is non-negotiable, apply SPF 50+ to any treated area exposed to sunlight, regardless of season. Sun damage between sessions can lead to complications at your next appointment.
Gentle exfoliation (a soft washcloth or mild scrub) can begin 1 to 2 weeks post-treatment to help treated hairs shed. You may notice what looks like continued growth, these are actually the treated hairs being pushed out of the follicle. They will fall out on their own. For overall skin health between sessions, regular facials help maintain hydration and skin quality without interfering with your laser protocol.
Keep your practitioner informed of any changes, new medications, sun exposure incidents, hormonal changes, or reactions between sessions. Maintaining open communication ensures your treatment parameters are adjusted appropriately. For a deeper understanding of the myths versus realities of the process, our article on laser hair removal myths and facts is a helpful companion read.
- ☐1. Is it approved or cleared by a regulatory body (FDA, Health Canada)?
Regulatory approval means independent scientists have reviewed the safety and efficacy data and found it sufficient. Without this, you are relying on marketing claims alone. - ☐2. How large are the clinical studies?
A study with 15 participants does not carry the same weight as a trial with 200. Look for systematic reviews that pool data from multiple studies. - ☐3. Who funded the research?
Manufacturer-funded studies are more likely to report favorable results. Independent research is more reliable. - ☐4. How long were patients followed?
A treatment that shows improvement at 4 weeks but has not been tracked at 6 or 12 months tells you very little about durability. - ☐5. How does it compare to established treatments?
If a new treatment has not been directly compared to proven options in head-to-head trials, there is no basis for claiming it is equal or superior.
Special Considerations
Sensitive skin: If your skin is naturally reactive, inform your practitioner before treatment. Settings can be adjusted and cooling can be increased. Post-treatment, stick to ultra-gentle products, no fragrance, no active ingredients for at least 72 hours. Sensitive skin patients often do exceptionally well with laser once the right parameters are dialled in.
Darker skin tones: Laser hair removal for dark skin requires specific expertise and equipment. Nd:YAG lasers at 1064nm are the gold standard, bypassing surface melanin to target the follicle safely. Pre- and post-care for darker skin should emphasise sun avoidance and gentle care to prevent post-inflammatory hyperpigmentation.
Hormonal considerations: PCOS, thyroid conditions, and hormonal medications can affect hair growth patterns and treatment outcomes. You may need additional sessions or maintenance treatments. Body treatments for larger areas may require adjusted protocols. For an evidence-based look at what the science says, read our analysis of the top benefits and risks of laser hair removal. And when you are ready to begin or have questions, book a free consultation to create a personalised plan. Browse real patient results to see what consistent care and proper technique can achieve.
Health Canada maintains strict standards for medical devices and injectable products used in aesthetic medicine. When evaluating any new treatment, check whether it has received Health Canada approval or clearance this is your strongest signal that independent experts have reviewed the evidence. All treatments offered at Reimagine Clinic meet or exceed these regulatory standards.
Before & After Care Timeline
Your complete care timeline, from weeks before to weeks after each session.
| When | What to Do | What to Avoid |
|---|---|---|
| 4–6 weeks before | Switch to shaving only | Waxing, plucking, threading, epilating |
| 2–4 weeks before | Apply SPF 50+ daily | Sun exposure, tanning beds |
| 1–2 weeks before | Confirm medications with provider | Retinoids, glycolic acid, photosensitisers |
| Day of | Shave, clean skin, loose clothes | Lotions, deodorant, makeup, caffeine |
| 0–48 hours after | Aloe vera, cool compresses, SPF | Heat, gym, pools, fragranced products |
| 1–8 weeks after | Gentle exfoliation, hydration, SPF | Waxing, picking, harsh exfoliants |
Frequently Asked Questions
How many sessions will I need?
Most patients need 6 to 8 sessions for optimal results, spaced 4 to 8 weeks apart. The exact number depends on the treatment area, hair colour, skin tone, and hormonal factors. Annual maintenance of 1 to 2 sessions keeps results long-term.
Can I get laser in the summer?
Yes, but sun avoidance is critical. Covered areas (bikini, underarms) are ideal for summer treatment. For exposed areas, strict SPF use and avoiding direct sun are essential. Many Montreal patients prefer starting in fall or winter for face and leg treatments.
What if I have a reaction between sessions?
Contact your clinic immediately. Prolonged redness, blistering, or pigment changes should be assessed. These are rare when proper protocols are followed, but early intervention prevents complications. Follow the official aftercare guidelines carefully.
Ready to Start Your Laser Hair Removal Journey?
Book a free consultation at Reimagine Clinic in Montreal. We will assess your skin and hair type, explain the process, and create a personalised treatment plan for smooth, lasting results.
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