The SIF (Sillon Inter-Fessier) is an intimate area that is often neglected, but which can cause a great deal of discomfort on a daily basis: irritation, ingrown hairs, discomfort when shaving…SIF laser hair removal offers a long-lasting, comfortable solution for eliminating this unwanted hair. CtrlZ explains everything you need to know about this delicate area: price, procedure, number of sessions and practical advice.
What is RIS in laser hair removal?
SIF stands for Sillon Inter-Fessier, or buttock crease. This is one of the intimate areas that can be treated with laser hair removal, along with the full bikini line and labia majora.
The SIF corresponds to the vertical line between the two buttocks, from the top of the furrow to the anus (perianal area). Depending on the individual, this area generally has more or less dense pilosity, which can be a source of discomfort:
- Irritation from rubbing clothes or during sports activities
- Very painful ingrown hairs
- Difficulty removing hair with a razor (inaccessible areas)
- Increased sweating and odours
- Aesthetic discomfort
💡 Good to know
SIF can be treated on its own or as a complement to a full bikini line. At CtrlZ, FIS hair removal is available for both men and women, with identical rates of €39 per session.
Why have laser hair removal of the RIS?
The benefits of laser hair removal in this area
Laser hair removal from the gluteal cleft offers many advantages over traditional methods:
1. Permanent removal of ingrown hairs
The FIS is an area particularly prone to painful ingrown hairs. By destroying the hair bulb, the laser permanently eliminates this problem.
2. Improved hygiene
Less hair means better intimate hygiene, less perspiration and less risk of irritation. As this area is difficult to access and is in constant contact with clothing, reducing body hair significantly improves daily comfort.
3. Everyday comfort
No more irritation when playing sports, cycling, running or simply sitting for long periods. SIF laser hair removal brings real comfort to everyday life.
4. Considerable time savings
No need to contort yourself to shave this hard-to-reach area every day. After laser treatment, you save precious time and avoid the stress associated with hair removal in this area.
5. Sustainable results
Unlike shaving (regrowth in 24-48 hours) or waxing (regrowth in 3-4 weeks), laser hair removal offers an 85-95% reduction in hair growth over several years.
For whom?
SIF laser hair removal is for all men and women who want to :
- Eliminate embarrassing hair growth in this intimate area
- Put an end to recurring ingrown hairs
- Improve their comfort when practicing sports
- Completing a full bikini line for a complete waxing of the intimate area
- Gain confidence and well-being in your daily life
⚠️ Important information
The FIS is an intimate area and requires a prior medical consultation with CtrlZ. This consultation enables us to check that there are no contraindications and to explain the specific protocol for this sensitive area.
How does a RIS laser hair removal session work?
Information consultation
Before any SIF laser hair removal session at CtrlZ, a free information consultation is mandatory. It includes :
- A medical questionnaire to detect any contraindications
- A systematic medical consultation (unique to CtrlZ)
- An examination of the area to be treated and your phototype
- A laser test to check your skin’s tolerance
- Detailed explanations of the protocol, precautions and expected results
- A transparent personalized quote
This is a no-obligation consultation. It gives you the opportunity to ask any questions you may have, in complete confidentiality, to our team of state-qualified nurses specifically trained in the removal of unwanted hair from intimate areas.
Session sequence
1. Preparation (5 minutes)
You are comfortably seated in an intimate treatment area, designed to respect your modesty. The area must be clean and clean-shaven the day before or the same day (see shaving instructions below).
2. Protection and positioning (2 minutes)
Protective eyewear is mandatory. Positioning depends on your comfort: lying on your stomach or on your side, legs slightly bent.
3. Laser treatment (5-10 minutes)
The nurse applies the laser to the entire gluteal cleft. The pulsed-air cooling system limits discomfort. You will feel a tingling sensation comparable to a slight “rubber band” and a sensation of warmth, which is generally well tolerated in this area.
4. Application of a soothing cream (2 minutes)
A healing cream is applied to the treated area. This cream is provided free of charge for home care on the following days.
Total session duration: 10 to 20 minutes maximum
💡 Did you know?
Thanks to its small surface area, the SIF is a quick area to treat. It’s often one of the shortest sessions in intimate laser hair removal!
Laser hair removal for RIS: how many sessions and at what pace?
Number of sessions required
To obtain an 85 to 95% reduction in the hairiness of the gluteal fold, it is necessary to count on average :
- 6 to 10 sessions for women
- 8 to 12 sessions for men (generally denser hair growth)
This number may vary depending on several factors:
- The density and thickness of your body hair
- Your phototype (skin color)
- Your age and hormone level
- Compliance with pre- and post-session instructions
- Respecting the intervals between sessions
Pace of sessions
The recommended interval between two sessions is 6 to 8 weeks. This allows us to respect the hair cycle and treat hair in its active growth phase (anagen phase), the only phase during which the laser is effective.
| Treatment phase | Number of sessions | Spacing | Visible results |
|---|---|---|---|
| Attack phase | 4 to 6 sessions | 6-8 weeks | 50-70% reduction |
| Consolidation phase | 2 to 4 sessions | 8-10 weeks | 75-85% reduction |
| Finishing phase | 1 to 2 sessions | 10-12 weeks | 85-95% reduction |
| Maintenance phase | 1-2 sessions/year | Depending on regrowth | Result maintenance |
First results
The first results of RIS laser hair removal are visible from the very first session:
- D+5 to D+30: treated hair gradually falls out
- After 2-3 sessions: significant reduction in density and finer regrowth
- After 6 sessions: significant daily comfort, 60-70% reduction in weight.
- After 8-10 sessions: optimal results with 85-95% reduction
Does laser hair removal for RIS hurt?
It’s THE question on everyone’s mind! Let’s be clear: the FIS is a sensitive area, but the pain is generally very bearable thanks to the modern equipment used at CtrlZ.
Level of pain felt
On a scale of 1 to 10, most patients rate their pain between 3 and 5/10. The sensations described are :
- Intense but brief tingling (like “rubber band snapping”)
- A sensation of localized heat
- Slight discomfort rather than real pain
The perception of pain varies greatly from one person to another, depending on :
- Your personal sensitivity
- the thickness and density of your hair (the thicker the hair, the more sensitive the first sessions may be)
- Time of menstrual cycle (for women, avoid the period just before menstruation, when sensitivity is heightened)
- Your stress and fatigue levels
How to limit discomfort?
At CtrlZ, several elements contribute to your comfort:
- Integrated cooling system: a pulsed jet of cold air cools the skin continuously as the laser passes over it
- Fast processing: 5 to 10 minutes maximum, no time to get bored!
- A trained team that listens: our nurses adapt the laser parameters according to how you feel.
- Possibility of breaks: you can request a break at any time if necessary
Good to know: pain diminishes with each session. As hair becomes finer and less numerous, sessions become progressively more comfortable.
💡 CtrlZ tip
If you are particularly sensitive, you can apply a numbing cream such as EMLA 1 hour before the session (available over the counter in pharmacies). Talk to us about it during your information consultation!
How much does laser hair removal for RIS cost?
CtrlZ tariff
At CtrlZ, SIF laser hair removal costs €39 per session, whether you’re a man or a woman.
This transparent rate includes :
- Laser hair removal session
- Post-session healing cream
- Systematic medical consultation before each session, if necessary
- Access to the 24/7 medical hotline
Total budget for a complete treatment
For a complete RIS treatment, count :
- Women (6-10 sessions): €234 to €390
- Men (8-12 sessions): €312 to €468
RIS complements other zones
FIS is often treated in conjunction with a full bikini line for complete removal of unwanted hair from the intimate area. Here are some examples of combined rates:
| Combination of zones | Price / session |
|---|---|
| RIS only | 39€ |
| Classic swimsuit + SIF | 108€ (69€ + 39€) |
| Low cut swimsuit + SIF | 118€ (79€ + 39€) |
| Full jersey + SIF | 138€ (99€ + 39€) |
To find out more about the rates and areas treated at CtrlZ, visit our laser hair removal rates page.
⚠️ Beware of overly tempting offers
An abnormally low price may conceal a lack of medical supervision or the use of unsuitable equipment. SIF laser hair removal is a delicate procedure requiring specific expertise and certified quality equipment.
Before and after a RIS laser hair removal session
Before the session (D-1 or D-day)
Mandatory shaving
The area should be clean-shaven the evening before or the day of the session. Use a multi-blade razor (preferably 5 blades) for a close shave.
How to shave the RIS properly?
- Take a hot shower to soften skin and hair
- Apply shaving cream or shower gel
- Use a mirror if necessary to get a good view of the area.
- Shave in the direction of hair growth to limit irritation
- Rinse thoroughly with lukewarm water
- Gently pat dry (do not rub).
- Do not apply any cream or product after shaving
Other pre-session instructions
- No sun exposure on the area in the 48 hours prior to the session
- Stop all other hair removal methods (wax, epilator, tweezers) 1 month before the first session
- Clean, healthy skin (no wounds, pimples, infections, external hemorrhoids, etc.)
- No scrubs, saunas or steam baths in the 72 hours preceding the session
- Avoid synthetic underwear the night before (prefer cotton)
After the session
Same day (D0)
- Apply the healing cream supplied by CtrlZ 2-3 times
- Wear loose-fitting cotton underwear
- Avoid excessive sweating (no strenuous exercise)
- No hot baths, saunas, steam rooms or Jacuzzis
- Lukewarm shower permitted with mild pH-neutral soap
- Gently pat dry
The following 2-3 days (D+1 to D+3)
- Continue applying the healing cream 2-3 times a day
- Avoid tight-fitting clothes and synthetic materials
- No sexual intercourse for 48-72 hours
- No swimming (pool, sea, spa)
- Gradually resume sport after 72 hours
Between sessions
- Daily intimate hygiene with a mild soap
- Wear cotton underwear
- No direct sun exposure on the area
- If necessary, touch-up with razor only (never wax).
- A gentle exfoliation 1 week after the session can help eliminate hair.
⚠️ Normal side effects
After a SIF laser hair removal session, you may notice: slight redness (disappearing in 24-48 hours), slight swelling around the follicles, a sensation of residual heat. These reactions are normal and temporary. In the event of persistent pain, burning or any other unusual effect, contact the CtrlZ hotline immediately.
Frequently asked questions
Is it embarrassing to have my RIS waxed?
No! Our nurses are trained professionals who treat intimate areas on a daily basis. Everything is done to preserve your modesty and comfort: a private treatment area, careful positioning and absolute discretion. There’s no reason to be embarrassed: it’s their job, and they do it with the utmost professionalism.
Can FIS be treated on all skin phototypes?
Yes ! At CtrlZ, we use dual-wavelength lasers (Alexandrite 755 nm + Nd-YAG 1064 nm) to safely treat all skin phototypes, from the lightest to the darkest. The Nd-YAG laser is specifically used for darker, matte skins.
Can FIS be performed during pregnancy?
No, laser hair removal is strictly contraindicated during pregnancy and breastfeeding. You may resume treatment 3 months after the end of breast-feeding, or after childbirth if you are not breast-feeding.
Is men’s RIS more expensive than women’s RIS?
No, at CtrlZ the price is the same: €39 per session for both men and women. Only the number of sessions may vary, depending on each person’s hair density.
How long does the result of laser hair removal last?
Results last for many years. CtrlZ claims total transparency: laser hair removal is not 100% permanent. After a complete treatment (6-10 sessions), you’ll see an 85-95% reduction in hair growth. Maintenance sessions (1-2 per year) may be necessary to maintain optimal results.
Is it necessary to shave the RIS before each session?
Yes, it’s mandatory. Shaving allows the laser to directly target the hair bulb under the skin. If the hair is long, the laser energy will be absorbed by the visible part of the hair instead of destroying the root, which considerably reduces the effectiveness of the treatment.
Can I combine SIF hair removal with other areas on the same day?
Yes, it’s possible and even recommended to optimize your movements! FIS is often combined with full bikini, buttocks or thighs. Talk to us about it during your information consultation to establish a suitable treatment plan.
Laser hair removal for RIS at CtrlZ: our commitment to quality
At CtrlZ,laser hair removal from the gluteal cleft enjoys the same level of expertise and safety as all our services. Our approach is based on three pillars:
1. Systematic medical supervision
Unique in France: medical consultation is systematic, not optional. A doctor validates your treatment during the information consultation, and remains available if needed before each session via teleconsultation or tele-expertise.
2. Team trained in intimate zones
Our state-qualified nurses are specially trained to treat intimate areas. They have mastered the positioning techniques, specific laser parameters and strict hygiene protocols required for these sensitive areas.
3. Certified state-of-the-art technology
All our centers are equipped with CE-certified dual-wavelength lasers that comply with NF standards. The integrated cooling system guarantees your comfort during the session.
4. 24/7 on-call medical service
CtrlZ is the only network to offer a medical hotline available 24/7, 365 days a year. In the event of an adverse reaction, or simply if you’re worried after your session, you can contact our team at any time.
5. Confidentiality and privacy
We know that treating an intimate area requires absolute trust. Each treatment area is private, and our teams are trained in kindness and discretion. Your psychological comfort is as important as your physical comfort.
An information consultation at CtrlZ is free and without obligation. It allows you to discover our centers, meet our team and get all the answers to your questions about RIS laser hair removal.
Make an appointment for a free consultation
