Most customers start to see evident hair reduction after 3-4 weeks. With 2-3 treatment per week, the effect becomes completely evident after 12 weeks. After each treatment, hair will grow much more sparsely and thinly. Eventually, hair reduction becomes permanent. To maintain the skin’s smoothness, you need to do 1 treatment every 2 to 3 months or as required. Both the outcome and frequency of treatment are different case by case. According to FDA’s regulations, permanent hair removal means ‘continued and steady reduction of hair over a prolonged period’, which we provide, though some may interpret the term ‘permanent’ differently. Please know that even the photo-therapy used in clinics is not entirely permanent.