Black blood clots in menstruation indicate blood stasis, which Chinese medicine believes is caused by nothing more than cold clotting, Qi stagnation, or Qi deficiency. Of course, menstruation is the most direct response to the health of a woman’s body, but it is not necessarily the result of the time or month, but may be the result of accumulation over time. If a woman likes to eat cold drinks in summer, or dresses cool, or wades in the water during her period, or loses maintenance after giving birth or miscarriage, her body will be attacked by cold, from the surface to the inside, stagnating and invading the uterus, and the cold will stagnate the blood vessels, manifesting as black blood clots when menstruating, which may be accompanied by dysmenorrhea, cold limbs, cold pain in the back and spine, and other symptoms. Therefore, women are the first to prevent cold and keep warm, especially during the period. There are some women who get wet or cold during their periods, which leads not to an increase in blood clots, but to a sudden stop of menstruation and pain when they have their next period, which is the result of feeling cold in the first place. Secondly, women with liver qi stagnation, emotional and mental discomfort, and intermittent qi flow, manifest as blood clots during menstruation. In Chinese medicine, the blood and qi are the same, and the qi flow is the blood flow, so menstruation with blood clots can be seen, but the qi stagnation is not detectable, but all accompanied by belching, chest distension and pain, feel comfortable after a long breath, all belong to the liver depression and qi stagnation type, clinical treatment to soothe the liver and strengthen the spleen as the rule, Prosperity Pill, plus flavor Prosperity Pill is commonly used. Finally, women who were born prematurely, or who had multiple miscarriages later in life deplete their Qi and Blood, resulting in Qi and Blood deficiency and inability to push the Blood forward, manifesting as menstruation with black blood clots and low volume, with a lethargic body. This type should be used to nourish Yin and nourish Blood, and not to move Qi and Blood, so as not to add deficiency to deficiency.