How many sessions of armpit hair removal do I need to not have any hair?

Hair goes through growth, regression, and rest phases, and the laser only reacts to hair in the growth phase with sufficient melanin. Therefore, not all hair is removed in one session, and typically after about 5 sessions, you will notice a significant reduction in coarse and dark hair, along with an extended shaving cycle. However, this does not mean complete hair removal, and the required number of sessions can vary based on individual factors such as hair root depth, density, and skin color.