Usually, the hair starts to grow 3-4 months after the hair transplant. Hair transplantation is the process of extracting hair follicles from the lower back of the head through professional equipment and planting them in the area of hair loss, where new hair can grow once the follicles survive. It takes three stages to grow new hair after hair transplant surgery. 1 month after starting hair transplant, the hair follicles and roots will grow smoothly. 1-3 months, there will be hair loss process, mainly due to the shedding of implanted hair and the survival of the hair follicles. 3 months later, the surviving hair follicles will grow new hair smoothly. During the treatment period, patients should follow the doctor’s instructions, take oral antibiotics according to the treatment course, and have regular review. In addition, patients should pay attention not to engage in strenuous sports, avoid bumping and prolonged pressure on the hair transplant site for one week after the surgery. 4-5 days later, the head should be cleaned, the temperature should not be too high, and try to use neutral shampoo.