During an IPL session, the intense blast of light and heat may be mildly uncomfortable. The discomfort feels like the mild snapping of a rubber band. The number of treatments required depends on the severity of the skin condition. Immediately after treatment you may see the treated spots become slightly darker. The treated area may have a slight sunburned sensation for a few days. It can take up to 3 weeks for the discoloration to slough off. For best results, 3-6 treatments are necessary spaced about one month apart.