The possibility of re-growth after using laser hair removal is influenced by more factors, such as whether the individual is hairy, whether the treatment is interrupted, whether the number of treatments is sufficient, and whether the treatment time is appropriate. Laser hair removal is mainly aimed at shedding treatment for hair in the growth phase, but it is basically ineffective for hair in the regression phase and resting phase, so multiple sessions are needed for hair removal treatment to be completely eradicated, usually 3-5 times, with a treatment interval of about 1 month, to achieve the desired effect. However, there are some people who have coarse sweat hair and need more than 5 times to achieve a more ideal effect. Usually, some people can achieve permanent removal after the hair removal treatment is completed. However, if the patient is hyperandrogenic or suffers from polycystic ovary syndrome, most of the hair will grow back after laser hair removal. The main purpose of hair removal is to minimize the hair, but the new hair will become finer and softer, and the growth rate will be slower, which still has some effect. During the treatment with laser hair removal, you should pay strict attention to sun protection and avoid being exposed to direct sunlight. Just after hair removal the skin is dry and sensitive to the surrounding environment, so you can do proper moisturizing and skin care. If abnormal conditions occur, such as blisters, burns or scarring, you need to be seen by a professional doctor for appropriate treatment.