How Much Time Is Allowed To Lapse Between Each Hair Laser Treatment?

You need to space your treatments to allow enough time for ample re-growth.  If you have no hair, you are not effectively treating the area, since the laser needs the pigment in the hair to treat the follicle.  It sounds like your current treatments are spaced fairly adequately - you can even drag it out longer between visits as your treatments progress.  More importantly, since you said you were traveling during the summer, check with your provider since sun exposure and color on skin will affect how most lasers will respond to your skin. You might need to wait for future treatment if you get too much sun exposure and pigment in your skin changes.   

Many people are not able to commit to an every four or six week interval in between laser hair removal treatments.  Trying to match the treatment with the growing phase of the hair cycle is possibly more academic than clinically required to obtain a satisfactory result in reduction of hair growth. If you have had several sessions and can not return for a few months, you can continue on your return.

Thank you for your question! It depends on the type of laser treatment that you have. I would advise you to wait at least two weeks between treatments. Certainly the skin needs to healed and be near its normal condition before repeating the treatment. Please avoid the sun immediately before and after the treatment. Best of luck!

Thank you for your question. You do not mention what area of the body you are having treated. However, the hair growth phase of each person is different. This also changes for each area of the body. Facial hair typically grows more quickly and you would want to return every 4-6 weeks. While, body hair takes more time to grow and you would return every 6-8 weeks. Laser hair removal treatment is done in series of 6-9 sessions. Remember sun exposure and a tan will affect how the laser will respond to your skin. You will need to wait on treatment if your skin is tanned

The time between each treatment is chosen arbitrary. Since laser or IPL works on actively growing hair follicle, the next treatment is for the new growth whenever that happens.

You will not jeopardize the results of your treatments by waiting longer between appointments.  You should continue to shave between treatments and resume them when you get back.

Fundamentally, laser energy works to destroy hairs that are actively growing (in anagen growth phase).  The growth phases vary for different regions of the body.  Usually, I recommend treating the face every 4 to 5 weeks because hair growth phases cycle in and out more rapidly.  For the underarms and bikini area, I usually recommend every 6 to 7 weeks, because growth cycles are slower. For best results, I also recommend that you try to have consecutive treatments at the same interval each time for at least 6 to 8 treatments, depending on the color of hair, area to be treated, coarseness and overall hair growth density.  I also place patients on a "maintenance" program, especially if unwanted hair is hormonally related.

Windell Davis Boutte, MD, Medical Director, Premiere Dermatology and Surgery, Lilburn, GA

We recommend waiting at least four weeks between Laser Hair Removal treatments. This is because the laser is only effective when the hair follicle is in its active growth phase. Repeat sessions will be necessary to treat those follicles when they re-enter the growth phase. Therefore, waiting longer between treatments will not ultimately affect your outcome. Optimal long-term benefits depend on the area you wish to have treated, the hair density, and your hair’s growth cycle.  Darker hair responds best to the laser, while lighter hair is less responsive. . Long-term hair removal depends on hair color, skin color, and the strength of the laser treatment as tolerated by the patient. Approximately 15-30% long-term hair loss may be observed with each treatment when optimal parameters are used.