The main reason for lying flat after a hair transplant is to minimize complications and wound bleeding. After hair transplant surgery, the doctor will often let the doctor lie flat, mainly because when lying flat, the wound can be pressed on the pillow, to play the purpose of wound pressure to stop bleeding, which can reduce the occurrence of postoperative hematoma complications, and can also reduce the wound blood seepage and promote the healing of the occipital incision. However, when lying down after hair transplantation, try to be able to put a layer of cotton pads on the pillow, which can better absorb blood and oozing tissue fluid, keep the surgical incision clean and dry state, and promote the recovery of the wound. If bleeding, infection and other abnormal conditions occur after surgery, it is recommended to go to a regular medical institution in time to avoid delaying the condition and causing adverse consequences.