The specific time of removing the drains of mastitis patients’ surgery must be decided in conjunction with the recovery of the mastitis patients’ condition. For some of the drains, if there is no obvious oozing, after ultrasound examination, the drains can be removed after 3-5 days of inflammation recovery, and then apply drugs or other microwave physiotherapy treatment, the inflammation will gradually reach the degree of cure. For some cases of mastitis with suppurative foci in multiple cavities, it may take more than 1-2 weeks to remove the drains, and some cases with obvious sinus tracts may take even longer. Therefore, the decision of when to remove the drain for mastitis surgery must be made under the guidance of a professional doctor, through ultrasound exploration and evaluation of the condition.