The hairs are in different growth cycles during a treatment. During a treatment, the light pulse or another type of laser can destroy only those hair roots that are in the anagen (growth) phase. For each treatment, this is about 10 – 15% of the hairs.

The hairs that are in the resting phase during treatment will grow back at intervals of about 4 – 12 weeks. During the next treatment, the new hairs that are currently in the growth phase are removed. With each subsequent treatment, body hair in the affected area steadily decreases.