Following a single treatment, most hairs do not regrow for one to three months (or more), depending upon the type of hair and its location. Because the laser only treats hair follicles that are actively growing, several treatments are necessary. Following multiple, appropriately timed treatments, a long-term growth delay is typically seen. Many patients obtain permanent hair removal, but some people require periodic touch-up treatments to keep unwanted hair away. Following several treatments, any remaining hair is much finer, lighter, and more cosmetically acceptable than prior to treatment.