There are two modes of laser treatment of freckles. We usually use nanosecond laser or picosecond laser for the first time. After treatment, the skin will break and scab, and there is a recovery time. This is peeling treatment. Generally speaking, scabs will form after two or three days of treatment. This scab usually falls off in about seven days. The fresh skin formed after peeling is a little red, and some people may not do well in sun protection or.