Drainage tubes left in place for a long period of time can lead to acute infections, dermatitis of the surrounding skin, and adhesion of the new tissue to the drain tube making it impossible to remove it. Therefore, it is necessary to follow the doctor’s instructions to remove the drain in time after surgery. 1. Dermatitis: Drainage tubes affect the skin around the tubes and stimulate the skin to have a rejection reaction, resulting in dermatitis. 2. Acute infection: Infection is the most common complication of prolonged placement of drains, which is a foreign body to the organism and connects with the outside of the cavity, increasing the possibility of intracavitary (abdominal cavity, etc.) infection. 3. Adhesion of neoplastic tissue to the drain: When the wound heals, the neoplastic granulation tissue adheres to the drain. Patients who have inserted drainage tubes need to have regular checkups, pay attention to the care of drainage tubes in daily life, and also remove the drainage tubes in time under the guidance of doctors to avoid a series of complications such as infections.