Treatment intervals: Laser hair reduction is most effective when performed as a series of 6–8 treatments with adequately long intervals between treatments. The intervals roughly encompass the duration of the telogen phase for the treatment area. Face & axillary: 4-6 weeks apart, upper body: 8-10 weeks apart, lower body: 12 weeks apart. Six months to 1 year after completion of an LHR treatment series, some patients may require a few follow-up treatments if dormant hairs have entered the hair growth cycle and become active.