Women who weigh 4 pounds heavier than usual during menstruation are considered to have more significant water and sodium retention due to the influence of hormones in the body after menstruation, thus causing weight gain, which will be relieved after menstruation clears, so the weight can also return to normal level, which can be observed without special treatment. However, if the weight does not decrease after menstruation, and sunken edema in the ankle is also found, it is necessary to go to the nephrology department to check the ultrasound and do the kidney function and routine urine examination to exclude whether the edema is caused by kidney disease, but most women consider the weight gain during menstruation as a physiological manifestation.