After the patient’s cleansing surgery, the vagina may show a relatively light blood-watery discharge, mainly because the patient’s vaginal effluent is not pure blood, but also contains mucus secreted by the vagina or cervix, as well as fluid exudation from the wound caused by the damage to the uterine cavity during the cleansing surgery. These blood exudates and mucus mixed together may form a pale blood-watery discharge. If the discharge does not have an odor, it is normal. If the discharge is light blood and has a foul odor after the removal surgery, it should be considered that there may be an infection of the uterine cavity, which is caused by inflammatory exudation after the infection of the uterine cavity, and the patient will be accompanied by abdominal pain and discomfort, fever, etc. It is necessary to gynecological internal examination, blood test and other related tests for differential diagnosis, and symptomatic treatment.