Diagnostic scraping refers to diagnostic scraping. After diagnostic scraping, the first menstrual period indicates that the endometrium has been well repaired and the amount of menstruation is as heavy as usual, about 20~80ml. Diagnostic scraping is commonly used for diseases such as endometrial hyperplasia, and pathologic tests can be performed for diagnosis along with treatment. Although the surgery will damage the endometrium, it will continue to grow due to the effect of estrogen, and when it grows to the same thickness as normal, menstruation will occur, with a volume of 20~80ml. If there is a significant change in the amount of menstruation after diagnostic curettage surgery, it is recommended to seek medical attention and standardized treatment to promote symptomatic relief.