The drain can usually be removed about 7 days after the left mastectomy. If the wound becomes infected after surgery or the drainage flow is relatively large, the time of removing the tube should not be rushed, and it varies from person to person. If you have a total mastectomy, blood and fluid will easily accumulate under the skin, which will easily cause infection and is not conducive to the healing of the wound. Therefore, after the left breast total excision, you must cooperate with the surgeon to insert the drainage tube, so as to facilitate the timely evacuation of subcutaneous accumulation of blood or fluid in the wound area, and usually the drainage tube can be removed in about 7 days and the wound area can be bandaged with pressure. If postoperative infection occurs after left breast excision, or the amount of drainage is relatively large, it is recommended to cooperate with professional doctors for treatment as soon as possible, and then remove the drain tube after the infection is eliminated and the wound is healed, and the time of removing the drain tube is not certain. Therefore, after the left breast excision, it is recommended to go to the hospital for regular checkups to keep abreast of the wound healing and whether there is any infection. Once any abnormality is detected, it is necessary to cooperate with the treatment as soon as possible to promote the recovery of the wound.