There is no such thing as myositis, in terms of obstetrics and gynecology there is the diagnosis of adenomyosis, which refers to the invasion of endometrial glands into the myometrium called adenomyosis. With each menstrual period, the uterus enlarges and takes on a spherical shape. Patients often have a history of increased menstrual flow, etc. The most typical clinical manifestation is progressively worsening dysmenorrhea, and some patients even need to take oral pain medication to relieve dysmenorrhea every time they menstruate. Treatment can take medication, but medication can not cure adenomyosis, and if the symptoms become more and more serious, surgery will eventually be needed.