Minimum 3 months. Most will require the FULL 6 MONTHS or longer. Our treatments slows down the rate of melanin production to give you long term results. It is not a quick fix which would be temporary. Pigmentation shouldn’t return as you block the trigger, usually UV light, which can be blocked by SPF50 suncreams, large hats, large sunglasses, seeking shade where possible. In cases where it is due to underlying health or hormonal conditions, this may vary. It is important to note that results vary from person to person and are not guaranteed.