This treatment is surprisingly quick, with even large numbers of brown spots able to be treated in less than 30-60 minutes. The OPT System can effectively remove the majority of freckles in a single treatment, although some people need more then one treatment depending on desire or depth of pigmentation. Immediately afterwards the area reddens and may feel like burn or sunburn, but this is short-lived. The pigment starts to darken, and over the next few days crusts over and then literally flakes off. Not only do you get a clear skin complexion, this treatment also rejuvenates and plumps your skin by stimulating the collagen and elastin in fibrous tissues below your skin layers.