How Many Sessions of Laser Hair Removal Do You Really Need?

Key Takeaways

• The number of sessions required for successful laser hair removal varies depending on a range of factors, including the treatment area, hair type, and hair colour. 
• Hair grows in multiple phases, and only hair in the active growth phase can be effectively treated.
• Lighter colours, such as red, grey, and fine hairs may be less responsive to laser treatment.

Understanding Laser Hair Removal Sessions

​Achieving effective hair reduction with laser hair removal treatments requires multiple sessions due to the hair growth cycle, which includes the anagen (growth), catagen (transition), and telogen (resting) phases.

Laser hair removal is most effective during the anagen phase, when hair is actively growing and connected to the follicle. This is especially true for individuals with dark hair, as the laser targets pigment in the follicle. Since not all hairs are in the same phase simultaneously, multiple treatments are necessary to target each hair during its anagen phase for optimal results

Why Multiple Treatments Are Required

Since individual hairs are in different phases at any given time, multiple treatment sessions are necessary to target each hair during its optimal growth stage. Additionally, factors such as hormonal fluctuations can influence hair growth patterns, underscoring the importance of a personalised treatment plan.

How Laser Targets Hair in Growth Cycles

​Laser hair removal works by emitting a concentrated beam of light that is absorbed by the melanin in hair follicles. The hair growth cycle consists of three phases:​

• Anagen (Growth Phase): This is when hair is actively growing and contains the most melanin, making it the most responsive to laser treatment. ​
• Catagen (Transition Phase): A brief period where hair growth ceases, and the follicle begins to shrink. ​
• Telogen (Resting Phase): The stage where the hair rests before eventually shedding. 

Since individual hairs are in different phases at any given time, multiple laser sessions are necessary to effectively target all hairs during their anagen phase.

Average Number of Laser Hair Removal Sessions

Understanding the average number of sessions required for effective laser hair removal is crucial for managing expectations and planning your treatments. Typically, individuals can anticipate needing between 6 to 10 sessions for significant hair reduction. This number, however, can vary considerably based on the specific body area being treated. 

‍

Typical Session Range by Body Area

Different body areas exhibit varying hair densities and growth rates, impacting the average number of sessions required:

• Facial Hair: 8 to 10 sessions, every 2 weeks.
• Legs: 6 to 8 sessions, every 4 to 8 weeks.
• Underarms: 6 to 8 sessions, every 4 to 6 weeks.
• Bikini: 6 to 8 sessions, every 4 to 6 weeks.

Face vs. Legs vs. Underarms: What to Expect

​When comparing laser hair removal treatments across different body areas, it's important to recognise that facial hair often necessitates more frequent sessions due to its faster growth cycle and finer texture. 

In contrast, larger areas like the legs typically require fewer sessions with longer intervals, aligning with the slower hair growth in these regions. 

​After completing your initial series of laser hair removal treatments, you might notice some hair regrowth over time. This is particularly common in areas influenced by hormonal changes, such as the face or bikini line. 

To maintain smooth skin and address any new growth, periodic maintenance sessions are recommended. Typically, these touch-up treatments are scheduled once or twice a year, depending on individual needs and the specific area treated

Factors That Affect the Number of Sessions Needed

Several key factors influence the number of laser hair removal sessions you may require. Understanding these can help manage your expectations and tailor your treatment effectively.

Skin Tone and Hair Colour

The success of laser hair removal depends a lot on the contrast between your skin tone and hair color. Darker hair tends to respond better to treatment because it contains more melanin—the pigment that absorbs the laser’s energy.

On the other hand, people with blonde, grey, or red hair often have less melanin, which can make the process slower and require more sessions.

Skin tone also matters. For those with darker skin, specific lasers or settings are often used to protect the skin while still effectively targeting the hair.

Hormones can also play a part. Conditions like Polycystic Ovary Syndrome (PCOS) which affects 1 in 10 women in the UK, often cause increased hair growth, particularly in areas that aren’t typically affected. This can make treatment more challenging, and those with PCOS might need more sessions or ongoing maintenance to keep results on track. By taking these factors into account, your practitioner can help you build a treatment plan that fits your needs.

‍

‍

How Often Should You Get Laser Hair Removal?

Achieving optimal results with laser hair removal requires scheduling sessions that align with your hair's natural growth cycle. Typically, treatments are spaced 4 to 8 weeks apart, depending on the area being treated and individual hair growth patterns. This interval allows the laser to effectively target hairs during their anagen (growth) phase, when they are most responsive to treatment.

Recommended Time Between Sessions

​Maintaining consistent treatment intervals is vital for successful laser hair removal. For facial areas, shorter intervals of approximately two to four weeks are often recommended due to the quicker hair growth cycle in these regions. This scheduling aligns treatments with the hair's anagen (growth) phase, enhancing the procedure's effectiveness.

Individual sessions can vary in duration; for example, treating the upper lip may take about one minute, while underarm treatments might last between five to seven minutes. Adhering to this tailored approach ensures optimal results across different treatment areas.

Signs You're Ready for the Next Session

​Knowing when to schedule your next laser hair removal session is key to achieving optimal results. A primary indicator is the appearance of new hair growth in the treated area, suggesting that previously dormant follicles have entered the active growth phase and are now susceptible to the laser.

Additionally, adhering to the treatment intervals recommended by your specialist—typically every 4 to 6 weeks—ensures that sessions are timed to effectively target hair during its most responsive stage. By monitoring these factors, you can maintain a treatment schedule that aligns with your hair's natural growth cycle, enhancing the overall effectiveness of the procedure

When Will You See Results From Laser Hair Removal?

A common question people have about laser hair removal is when they’ll start to see results. While the exact timeline can vary from person to person, most begin noticing a difference after just a few sessions. In many cases, there’s a visible reduction in hair growth and thickness early on in the treatment process.

Results After 1, 3, and 6 Sessions

Many people notice a slight reduction in hair growth after their first laser hair removal session, though results vary. The most visible improvements usually appear after three to six treatments. According to clinical studies, patients can see up to a 70% to 90% reduction in hair growth after completing a full treatment course. This reduction typically shows up as finer, lighter, and fewer hairs in the treated areas.

‍

How to Know If It’s Working

To track how well your laser hair removal is working, pay attention to changes in the texture and thickness of any regrowth. As you go through more sessions, you’ll likely notice that the hair becomes finer, lighter, and less dense. Keeping open communication with your provider can help you gauge progress, and taking photos or notes after each session can give you a clearer picture of your results over time.

Is Laser Hair Removal Permanent After Several Sessions?

Laser hair removal can be a great way to reduce unwanted hair long-term, but it’s important to have realistic expectations. While many people hope for permanent results, some hair may eventually grow back. The good news is that any regrowth is usually much finer and lighter, making it far less noticeable and easier to manage.

Maintenance Treatments and Long-Term Results

Even after your initial round of laser sessions, touch-up treatments every couple of months can help keep regrowth in check. Hair can come back over time—usually finer and lighter—so these follow-ups are key to keeping your results consistent. Staying on a regular schedule helps you maintain smoother skin with less effort, so you can skip the razor and ditch the wax for good.

What to Do If Hair Grows Back

If you notice hair regrowth after completing your laser hair removal sessions, don't be discouraged. It's common for some hair to return, though it's typically finer and lighter than before, making it less noticeable and easier to manage. ​

To effectively address this regrowth:

• Consult Your Practitioner: Reach out to your laser hair removal specialist to discuss the regrowth. They can assess your situation and determine if additional treatments are necessary. ​
• Consider Maintenance Sessions: Periodic maintenance treatments can help manage and reduce any returning hair, ensuring long-term results. ​
• Avoid Waxing or Tweezing: Between sessions, refrain from waxing or tweezing, as these methods can disrupt the hair follicle and potentially affect the efficacy of future laser treatments. ​

By maintaining open communication with your practitioner and adhering to their recommendations, you can effectively manage any regrowth and enjoy smoother skin over the long term.

Customising Your Laser Hair Removal Treatment Plan

​Developing a personalised laser hair removal plan is key to achieving the best results. During your initial consultation, your practitioner will assess factors such as your hair colour, texture, and growth patterns, as well as your skin type. 

‍

‍

Consultation and Personalisation Based on Your Needs

In the initial consultation, the professional will evaluate your individual needs and preferences thoroughly. This comprehensive assessment allows for the development of a personalised treatment plan that aligns with your specific goals. 

Strategies may differ based on the areas being treated and personal skin reactions, ensuring a tailored experience throughout your laser hair removal journey. This level of care and attention is a core part of the approach at the Institute of Medical Physics, where each treatment is thoughtfully adapted to you.

Tracking Progress and Adjusting Over Time

Keeping track of your progress is vital during laser hair removal treatments. Regular follow-up appointments allow both you and your practitioner to evaluate how well the treatment is working and make any necessary adjustments.

Since hair grows in cycles, these scheduled sessions help ensure that hairs in their active growth phase are effectively targeted, enhancing the overall success of the procedure. By staying consistent with your treatment plan and maintaining open communication with your provider, you can achieve smoother skin and address any concerns that may arise throughout the process.

Before You Go...

​Achieving optimal results with laser hair removal depends on factors like hair characteristics, treatment area, and skin health. Collaborating with your clinician for personalised recommendations enhances your treatment experience. By adhering to maintenance schedules and following advised methods, you can attain satisfying long-term outcomes. Emphasising thorough consultations ensures the best possible results on your laser hair removal journey.​

For those exploring advanced options, the Institute of Medical Physics offers Laseinfinity™ Super Laser Hair Removal. This treatment utilises six precisely engineered, full-spectrum lasers, allowing for customisation across various hair types and skin tones.

About Institute of Medical Physics

The Institute of Medical Physics, founded by Dr. Emanuel Paleco, is at the forefront of Medical and Aesthetic Laser Science, with a flagship clinic in King's Cross and locations across North London and Essex. Our mission is to provide cutting-edge treatments rooted in science and guided by patient wellbeing.

Our exclusive Laseinfinity™ treatment represents the next generation of laser hair removal. By combining six advanced laser technologies into one comprehensive system, Laseinfinity™ allows for precise, safe, and effective treatment across all skin types and tones. Whether targeting fine facial hair or larger body areas, this system is designed to deliver lasting results with minimal discomfort.

At the Institute of Medical Physics, we are committed to innovation, safety, and personalised care—empowering you to feel confident in every treatment you choose. To learn more about Laseinfinity™ and determine if it's suitable for your needs, book a consultation with us today!