Actively growing hairs that are treated should not grow back. Once a hair follicle is damaged it cannot grow back. However, hair follicles that were not in the active growth phase will need to be treated. It’s also not unusual for patients to have a touch up two years after initial treatment due to

The hair grows in cycles across the entire body. And that’s the main reason you need multiple laser hair removal sessions, rather than just one. There are four stages: Anagen (growing), Catagen (transition), Telogen (resting), and Exogen (new hair growth). Every hair may be at a different stage in the growth cycle at any one time, which makes targeting and removing them all equally incredibly tough. It would be easier for everyone if a single session was enough to remove unwanted hair, but that’s just not the case. Multiple sessions allow the laser to treat the hair at the anagen stage. This is essential, as it’s the only point at which the hair follicle remains attached to the bulb and the laser’s light can disrupt future growth properly. Undergoing multiple sessions creates better coverage and makes laser hair removal more effective. Stopping at just one treatment could leave you with unwanted growth in visible areas over time, no matter how well the initial treatment goes.