The factors leading to pressure injury include poor local skin blood supply, long-term bed rest, and long surgery time, etc., as follows: First, poor local skin blood supply: when the blood supply is low, local pressure is prone to necrosis. Second, long-term bed rest: for example, patients with hemiplegia or patients with limited mobility need to be turned properly, and special pneumatic pads can be used to prevent local pressure injury. Third, long surgery time: If a larger surgery is done, the surgery time will be longer, and then local pressure injury may also occur, so generally during the surgery, the local area will be padded with softer cushions, and sometimes it is necessary to use a pneumatic pump for treatment. After the discovery of pressure injury, you need to actively treat, you can generally apply topical iodophor or Bactrim, etc. to prevent infection, you can also apply special hydrocolloid patch to help the recovery of the wound, the specific treatment plan need to consult with the doctor.