Laser hair removal, the minimally invasive procedure that kills the hair follicles and has the results lasts for years as mentioned in. However, the other side of the story is that it might take up to a year to reach those long-lasting results. This is because lasers work closely in association with the hair growth cycle.
Depending upon the percentage of hair in the active growth period at a given time, each session of laser shows about 20% of the results. Therefore, the treatment is divided into multiple sessions to allow the doctors to target each of the hair follicles.
Several other factors determine the effects of laser hair removal as well. So, let us find out how many sessions of laser hair removal you need in this article.
Table of Contents:
- Part 1: Does Laser Remove Hair Permanently?
- Part 2: Factors Affecting the Number of Sessions
- Part 3: Typical Number of Sessions
- Part 4: What Happens After One Laser Hair Removal Session?
- Part 5: Can I Shave Between Laser Hair Removal Sessions?
Part 1: Does Laser Remove Hair Permanently?
Unfortunately, laser hair removal is not a permanent procedure. Currently, electrolysis is the only hair removal treatment regarded as permanent. However, the plus point of the laser is that it is a commonly done procedure with results lasting for 2 to 10 years and hair growing back to be finer and thinner whenever it sprouts out.
Check how long does laser treatment lasts as well. Furthermore, below is an explanation of why the laser is not permanent and why you need multiple sessions.
The Working Principle of Laser Hair Removal
The concept behind laser hair removal is selective photo-thermolysis. It is a mechanism in which the laser gets absorbed into the pigment in the hair to go into the hair follicle where it is converted into destructive heat.
This heat either puts the follicle into a dormant state or annihilates it. Therefore, the ability of the hair follicle to produce hair is gone.
The Association of Laser Sessions with Hair Growth Cycle
Now you know that a laser needs pigment to reach the follicles, right? There are 3 phases of hair growth given as,
- Anagen: In this phase, hair receives direct blood supply from the follicle containing a high amount of pigment, and lies in the papilla. In this phase, the laser can efficiently reach and destroy the follicle.
- Catagen: In this phase, the active growth of the hair stops, it is removed from the papilla, and is pushed outwards. In this phase, it can be challenging for the laser to be effective.
- Telogen: The hair goes into a dormant phase and stays here for several days until it falls out. In this phase, the laser is ineffective.
As only 20-80% of hair is in the anagen phase at any time, not all hair can be targeted in 1-2 sessions. Furthermore, it is difficult to recognize in which phase the maximum hair is at. So, you will need multiple sessions of laser hair removal.
Part 2: Factors Affecting the Number of Sessions
Hair Color and Type:
Even though the advanced laser can be used on any hair color, dark-haired people are still the most suitable candidates for laser and they need fewer sessions. Additionally, if your hair is thick and dense, you’d need more sessions to kill the strong hair follicle.
Skin Type:
The greater the contrast between the skin tone and hair color, the lesser number of sessions will be required. For example, fair tones respond better to the treatment. Additionally, skin sensitivity matters as doctors have to take extra care of such skin which can prolong the treatment sessions.
Treatment Area:
The response of treatment areas of the body to laser greatly affects the number of sessions required. For example, facial hair shows a quick response and requires fewer sessions while leg hair requires more sessions as the hair in this region is stubborn.
Hormonal Factors:
Hormonal status is a big factor affecting the initial sessions and longevity of laser hair removal. This is because hormones control the activity of the hair follicles.
So, if you have any hormonal disorder like PCOS or are taking hormonal contraceptives like OCPS, it is likely that you will need more sessions of laser.
Part 3: Typical Number of Sessions
The number of hair removal sessions for different parts of the body is variable as they are influenced by several factors. Patients have reported about 80-100% results after the completion of the recommended sessions. So, let us find out how many sessions are required for individual parts.
How Many Sessions of Laser Hair Removal for Brazilian Hair Removal?
For Brazilian hair removal, the recommended number of sessions is 6 to 9 to achieve optimal results. But remember that you will need 2 to 4 additional sessions for 100% hairlessness. Also, each session of laser hair removal for Brazilian takes 15-25 minutes.
How Many Sessions of Laser Hair Removal for Upper Lip?
Upper lip hair is fine and less coarse as compared to the hair on the body. So, you only need 4 to 8 sessions to notice a significant reduction in the upper lip hair. Each session takes only 5 minutes for the upper lips.
How Many Sessions of Laser Hair Removal for Armpits?
Armpit hair is dense and coarse. Also, it is greatly affected by hormones. Therefore, an average of 5 to 10 sessions is enough for laser hair removal on the armpits. Here, the treatment takes approximately 15 minutes.
How Many Sessions of Laser Hair Removal for Legs?
6 to 12 sessions of laser hair removal are mandatory to kill 90 to 100% of hair follicles on the legs. The laser treatment on the legs can be time-consuming as it takes 30 to 60 minutes for 1 session.
How Many Sessions of Laser Hair Removal for Bikini?
The number of laser hair removal sessions on bikini lines is similar to that of the Brazilian. Thus, 6 to 12 sessions can do a good job with each session taking 15 minutes.
How Many Sessions of Laser Hair Removal for Face?
Laser hair removal on the face generally takes fewer sessions and you can get the desired results in 3 to 6 treatments with every treatment taking 10 to 20 minutes.
How Many Sessions of Laser Hair Removal for Chin?
Chin hair is stubborn. Therefore, an average of 10 treatments are needed to remove the hair on the chin. However, as the area is small, each session takes only 5 minutes.
How Many Sessions of Laser Hair Removal for Full Body?
The number of laser hair removal sessions to achieve hairlessness on the whole body is highly variable. So, here is the table to compare several sessions required for different parts of the body.
| Body areas | Session needed |
| Brazilian | 6-12 |
| Upper lip | 4-8 |
| Armpits | 5-10 |
| Legs | 6-12 |
| Bikini | 6-12 |
| Face | 3-6 |
| Chin | 6-10 |
The Spacing Between Adjacent Sessions?
The duration of the hair growth cycle in different areas of the body is variable as well. Therefore, you would need to schedule the treatments 4 to 6 weeks apart on the areas where hair grows faster like the face, and 6 to 8 weeks apart on which the hair growth cycle is slow like the body.
Considering the spacing between the individual sessions and the total number of treatments, the completion of laser hair removal usually takes 1 to 1.5 years in total.
Role of Individual Factors
The rule of thumb does not apply to laser hair removal. Additionally, each individual responds uniquely to the treatment. Therefore, one cannot say how many sessions will you need to achieve the desired results.
The sessions mentioned here are average but not accurate. So, always remember that you might need fewer or more sessions for the best results.
Part 4: What Happens After One Laser Hair Removal Session?
Are you curious about what to expect after a single session of laser? Here is your answer.
Immediate Effect on Hair
You might see no effect immediately after your laser session as you have already shaved and there is no hair to see. However, in the span of a few days, you will notice that the hair is shedding out of the follicles, its regrowth is slower, and the hair that grows back is finer.
A single session reduces the hair by 5-10% which is barely noticeable. So, you will have to be patient for a few more sessions to observe significant results.
After Effects on Skin
In addition to the Effects on the hair, you should be mentally prepared for its after-effects on the skin. These include,
- Skin redness that might be diffused or in the form of specks
- A slight discomfort feeling which could be painful or felt just as tingling
- Skin irritation and itching that goes away on its own
Ways to Reduce Side Effects and Improve Results
You can face the side effects of laser hair removal treatment for 1 day to 1 week and hair from killed hair follicles keeps falling for a month as well.
Therefore, you should follow the instructions given by your technician and post-care protocol to help the skin heal, and the hair shed, and prepare yourself for the next session. The post-care tips of laser are mentioned in detail in What to do after laser hair removal.
Part 5: Can I Shave Between Laser Hair Removal Sessions?
Yes, of course, you can shave in between the laser hair removal sessions. It is just that you should have hair on the skin as you go for the first consultation so that the doctor can determine your hair growth and devise a plan accordingly.
After that, you are requested to shave the treatment area every time you go for the sessions. Plus, you can shave whenever you notice the hair regrowth.
Additionally, shaving is the preferred method of hair removal when you are getting treated by laser. It is because methods like waxing, threading, and depilatory creams either affect the hair follicle or sensitize the skin. Also, give When can I shave after laser hair removal? a read.
Conclusion
In this article, we talked about the average number of treatments required for laser hair removal based on the consumers’ experience. However, laser hair removal treatment is programmed according to individual requirements, and the sessions are scheduled accordingly.
Therefore, it is important to discuss with your doctor the requirements and results of the treatment. The doctor can give you an idea about it but cannot say a thing for sure. So, it is in your best interest to set realistic expectations and believe the technician when it comes to the treatment.
Insights, advice, suggestions, feedback and comments from experts
Introduction
As an expert in laser hair removal, I can provide you with comprehensive information on the topic. Laser hair removal is a minimally invasive procedure that targets hair follicles, resulting in long-lasting hair reduction. However, it's important to note that the procedure is not considered permanent, unlike electrolysis. In this response, I will address the concepts discussed in this article, including the working principle of laser hair removal, factors affecting the number of sessions, typical number of sessions for different body areas, what happens after a session, and whether shaving between sessions is allowed.
The Working Principle of Laser Hair Removal
Laser hair removal works on the principle of selective photo-thermolysis. The laser targets the pigment in the hair, which absorbs the laser energy and converts it into heat. This heat then either puts the hair follicle into a dormant state or destroys it, preventing further hair growth [[1]].
The Association of Laser Sessions with Hair Growth Cycle
Hair growth occurs in three phases: anagen, catagen, and telogen. The anagen phase is the active growth phase, during which the hair follicle contains a high amount of pigment and is most susceptible to laser treatment. The catagen phase is a transitional phase, and the telogen phase is a dormant phase. Since only a percentage of hair is in the anagen phase at any given time, multiple sessions of laser hair removal are required to target all the hair follicles effectively [[1]].
Factors Affecting the Number of Sessions
Several factors influence the number of laser hair removal sessions required:
-
Hair Color and Type: Dark-haired individuals tend to be the most suitable candidates for laser hair removal, as the laser targets the pigment in the hair. Dark, thick hair responds better to treatment, while lighter or finer hair may require more sessions [[2]].
-
Skin Type: The contrast between the skin tone and hair color affects the number of sessions needed. Fair skin tones tend to respond better to treatment. Additionally, skin sensitivity can impact the duration of the treatment sessions [[2]].
-
Treatment Area: Different areas of the body respond differently to laser hair removal. Facial hair tends to show a quicker response and requires fewer sessions, while leg hair may require more sessions due to its stubborn nature [[2]].
-
Hormonal Factors: Hormonal imbalances, such as polycystic ovary syndrome (PCOS) or the use of hormonal contraceptives, can affect the initial sessions and the longevity of laser hair removal. Hormones play a role in controlling the activity of hair follicles [[2]].
Typical Number of Sessions for Different Body Areas
The number of laser hair removal sessions varies depending on the body area being treated. Here is a breakdown of the average number of sessions for different body areas:
- Brazilian Hair Removal: 6-9 sessions for optimal results, with 2-4 additional sessions for complete hairlessness [[3]].
- Upper Lip: 4-8 sessions [[3]].
- Armpits: 5-10 sessions [[3]].
- Legs: 6-12 sessions [[3]].
- Bikini: 6-12 sessions [[3]].
- Face: 3-6 sessions [[3]].
- Chin: 6-10 sessions [[3]].
It's important to note that these numbers are averages and individual results may vary. The spacing between sessions also depends on the area being treated, with faster-growing areas requiring treatments every 4-6 weeks and slower-growing areas requiring treatments every 6-8 weeks [[3]].
What Happens After One Laser Hair Removal Session?
After a single session of laser hair removal, immediate effects on the hair may not be noticeable. However, over the course of a few days, you may observe hair shedding from the treated follicles, slower regrowth, and finer hair when it does grow back. Each session typically reduces hair by 5-10%, so multiple sessions are necessary to achieve significant results [[4]].
After a session, you may experience temporary side effects such as skin redness, slight discomfort, skin irritation, and itching. These effects usually subside on their own within a week. Following the post-care instructions provided by your technician can help minimize side effects and improve results [[4]].
Shaving Between Laser Hair Removal Sessions
Yes, you can shave between laser hair removal sessions. In fact, it is recommended to shave the treatment area before each session. Shaving is the preferred method of hair removal during laser treatments because other methods like waxing or depilatory creams can affect the hair follicle or sensitize the skin [[5]].
Conclusion
In conclusion, laser hair removal is a popular procedure for long-lasting hair reduction. It works by targeting the pigment in the hair follicles, but multiple sessions are required due to the hair growth cycle. The number of sessions needed varies depending on factors such as hair color, skin type, treatment area, and hormonal factors. After each session, you may observe gradual hair reduction and finer regrowth. Shaving between sessions is allowed and recommended. Remember to consult with your doctor or technician to determine your individual requirements and set realistic expectations for the treatment [[1]][[2]][[3]][[4]][[5]].
