Bleeding during ovulation may be caused by a drop in progesterone levels and luteal insufficiency, while swelling of the legs during ovulation may be due to the phenomenon of water and sodium retention caused by an increase in estrogen levels in the body. At the time of ovulation, due to the drop of hormone level from high to low and the insufficient function of the corpus luteum after ovulation, it may lead to partial shedding of the uterine lining, which is manifested as vaginal bleeding. In addition, the phenomenon of leg swelling during ovulation is mostly related to the increase in hormone levels during ovulation, especially the increase in estrogen levels, mostly because estrogen has the effect of promoting water and sodium retention, which will cause metabolic imbalance, so that the body’s water is not discharged smoothly, resulting in oedema phenomenon, which is usually manifested as oedema at the end of the limbs, but the oedema is relatively mild, and it will disappear gradually after ovulation. Bleeding and leg swelling during ovulation can be restored to normal after ovulation, and no special treatment is needed. For those who can not recover for a long time, it is an abnormal phenomenon, and it is recommended to consult a doctor in time.