The most common clinical manifestations of adenomyosis are heavy menstrual flow and persistent menstrual cramps that are considered to be increasingly severe. Patients with adenomyosis have a poorly contracted myometrium because the lesions are distributed within the myometrium and the entire myometrium is invaded by endometrial tissue, which increases the area of the endometrium. The maturation of the endometrium is different in different parts, and the endometrium will be shed-like during menstruation under the influence of hormone level, because there is a lot of endometrium within the myometrium, and the time of endometrium shedding is different in each part, which will lead to a longer time of coming to menstruation all the time. Over time, the uterine muscle wall will thicken and harden significantly, and stale blood will be seen within the myometrium.