Patient's question:
NoDoctor's answer:
There are several reasons why menstrual blood may turn black. There are two possible causes for black menstrual blood: one is gynecological inflammation, and the other is body coldness. The most common cause is the "uterine cold" as described in traditional Chinese medicine. The main clinical manifestations of uterine cold include a reduced menstrual volume, accompanied by abdominal pain, blood clots, and in some cases, cold limbs and sweating. Additionally, an overly hot constitution can also lead to similar clinical manifestations. Patients may experience a sparse menstrual flow with a darker color, such as dark red or coffee-colored, and may occasionally have abdominal pain. Another factor is an abnormally thin endometrium, which can also result in reduced menstrual volume. Furthermore, certain medications, changes in external environment, and alterations in lifestyle habits can also cause temporary reductions in menstrual volume or changes in its color.