Laser hair removal devices are cleared by the FDA for "permanent hair reduction." We want you to know what to expect in terms of short-term and long-term results. Hair reduction is not permanent hair removal, and misunderstanding this could lead to feelings of disappointment.
There are a few reasons why a bit of hair may grow back at some point after you complete your laser hair removal sessions. One, as you may understand, is that hair grows in cycles. Laser treatments can eliminate hair that is actively grown (anagen phase). It cannot contact hairs in the catagen (transitional) or telogen (rest) phase of the cycle. You have many thousands of hairs in the area treated with laser technology. It may be impossible to fully disable every follicle in any number of treatments. However, laser treatments are proven to achieve remarkable results, and these can last.
Generally, laser hair removal is deemed effective in hair reduction reaching approximately 90 percent. While you may experience regrowth at some point, the hair that grows back will most likely be very light and thin. Periodic touch-ups can address mild regrowth as needed, or a quick shave every 1-2 months can catch the rest.