Black, sticky blood clots during menstruation.

Menstruation has black viscous blood clots, mostly due to long-term blood stasis in the local, so the blood clots into blocks, oxidation after the color will become black. Women will also be accompanied by dysmenorrhea symptoms, mainly due to cold during menstruation or long-term mental stress caused by factors such as excessive. You can also use hot water bags to compress your abdomen during menstruation. During menstruation, you must prevent strenuous exercise, not sex, not swimming, and prevent cross-infection.