What Happen if I Use Laser Hair Removal in Less Than Two Weeks Interval Session? Does It Have Any Bad Effect?

What Happen if I Use Laser Hair Removal in Less Than Two Weeks Interval Session? Does It Have Any Bad Effect?

Doctor Answers 5

Wait longer between laser hair removal treatments

Usually, the recommended interval between laser hair removal treatments is 4-8 weeks due to the laser being effective against hairs in only one phase of the hair growth cycle. Less than two weeks is too soon. Sometimes it can take the hairs up to 2 weeks to fall out, so a treatment that soon does not make sense. There is no need to subject your skin to excess treatments, especially when it is not beneficial.

San Francisco Plastic Surgeon
4.8 out of 5 stars 50 reviews

Laser Hair Removal Successions - Not Recommended Less than Two Weeks Apart


The negative effect is that you most likely will not have a very successful hair reduction treatment.  We recommend getting laser hair removal treatments every 4-8 weeks because hair grows in cycles.  The goal is to treat during the active life cycle to destroy the hair follicle and prevent regrowth.  We recommend a total of 6 laser hair removal treatments.  However some patients may require additional treatments in order to maintain results.  I hope this helps!

Paul L. Leong, MD, FACS
Pittsburgh Facial Plastic Surgeon
4.9 out of 5 stars 47 reviews

2 week intervals too frequent for Hair Removal

Laser Hair Removal is most often performed in our office at 6-8 weeks intervals, depending on the site.  With proper treatment parameters and with the appropriate laser, most all hairs should have been temporarily removed or damaged with each treatment, with the damaged hairs falling out over the 1-2 weeks after treatment.  It will normally take 4-8 weeks, or more, for the hairs that have not been permanently damaged to regrow to a significant enough length for re-treatment.  In general, with each treatment you should see long term or complete hair reduction of about 20-25% of the remaining hairs.

Hair treatment at very frequent intervals such as you describe, is of no benefit in the properly treated patient.

Jeffrey C. Poole, MD
Metairie Dermatologic Surgeon
5.0 out of 5 stars 6 reviews

Optimal intervals for laser hair removal

Recommended intervals between laser treatments are based on the time required to allow hairs to enter their active growing cycle. The laser is only effective when the hair follicle is in its active growth phase. Generally, about 15% of hairs are permanently removed with each laser treatment. Repeat sessions are necessary to treat additional hair follicles when they re-enter the growth phase.

Mitchell Schwartz, MD
South Burlington Dermatologic Surgeon
4.7 out of 5 stars 12 reviews

Benefit of LHR treatments in less than 2 week intervals?

You get minimal to no added benefit if you get your laser hair reduction treatments at 2 week intervals or less. The rationale for getting treatments at 4-6 week intervals is to try to capture as many hairs  that in their active growth phase as possible. This gives you the most benefit (in terms of hairs effectively treated) for the time spent. 


Be patient, stick to the recommended schedule for best results.

Anifat Balogun, MD
Seattle Otolaryngologist

These answers are for educational purposes and should not be relied upon as a substitute for medical advice you may receive from your physician. If you have a medical emergency, please call 911. These answers do not constitute or initiate a patient/doctor relationship.