Drainage tubes can be placed after gallbladder surgery to help the discharge of stagnant blood, avoid infection, and also facilitate the drainage of bile in the bile duct. Drainage tubes are usually placed after gallbladder surgery. Localized bruising occurs after surgery, placing drainage tubes can help discharge the bruising and strengthen local drainage, which can avoid local inflammation and infection; for bile duct stones, T-tubes placed after surgery can also promote the discharge of bile in the bile duct, prevent bile duct stenosis, and promote the recovery of the body. The indwelling drainage tube should be sterilized regularly to ensure that the wound is clean and dry, to avoid infection of the surgical incision, and daily attention should be paid to a light diet, avoid spicy food stimulation, postoperative activities, supplemental nutrition, and promote the recovery of the wound.