The number of Halo treatments needed for ideal response varies according to your skin condition and your tolerance of down time. The deeper the treatment and the greater the density of treatment, the longer the down time, but the better the response to just one treatment. In most cases of pigmentation and coarse skin texture, we usually are recommending two treatments spaced about 2 months apart and then one treatment per year. You need to do your part as well by using home care products, zinc based sunscreens, and doing smaller, less expensive skin rejuvenating treatments such as chemical peels, microlaser peels, SilkPeels to keep your skin moving.