Electroacupuncture for Dysmenorrhea Secondary to Adenomyosis

Inclusion Criteria: * Meeting the diagnosis criteria of dysmenorrhea secondary to adenomyosis. * Female patients aged between 18 and 50. * Dysmenorrhea lasting for 3 consecutive menstrual cycles or more. * At least three consecutive menstrual cycles with an interval of 24 to 38 days, differing by less than 7 days, and menstrual periods lasting 2 to 8 days before screening. * At least 2 days of worst pain score ≥4 on Numerical Rating Scale during the screening period. * Having not used medications, other than rescue medicine, or therapies for dysmenorrhea secondary to adenomyosis for at least 1 month before randomization, and consenting not to use throughout the process of the research. * Volunteering to participate the trial and signing written informed consent. Exclusion Criteria: * Diagnosed with Endometriosis or having a history of endometriosis-related surgery * Currently taking hormonal medications, including: a.use of GnRH agonists within 6 months before the screening period; b. use of progestins or danazol and other long-acting hormones within 3 months before the screening period; c. use of oral contraceptive-like short-acting hormones within one month before the screening period; * Having clinically significant gynecologic condition such as clinically significant endometrial pathology, persistent complex ovarian cyst larger than 3 cm or simple ovarian cyst larger than 5 cm, or single fibroid 4 cm or larger or more than 4 fibroids measuring at least 2 cm or symptoma…