A randomized controlled study of improved pelvic sacral moxibustion in the prevention and treatment of primary dysmenorrhea with cold coagulation and blood stasis

INTERVENTION: improved pelvic sacral moxibustion group:improved pelvic sacral moxibustion;traditional ginger pelvic sacral moxibustion group:traditional ginger pelvic sacral moxibustion; CONDITION: primary dysmenorrhea with cold coagulation and blood stasis PRIMARY OUTCOME: Severity of dysmenorrhea; SECONDARY OUTCOME: infrared thermography;TCM symptoms and signs;Menstruation situation;Hemodynamic examination of endometrium and uterine artery; INCLUSION CRITERIA: ? Women aged between 18 and 50; ? Regular menstrual cycle (21±7 days); ? Color ultrasound and gynecological examination showed no organic disease; ? Dysmenorrhea VAS (visual analog score) >40 at the time of inclusion ? In the menstrual cycle prior to this treatment, no other treatment was received, and no analgesics, sedatives or hormone drugs were taken; ? Nearly half a year without pregnancy plan; ? The patients voluntarily participate and sign the informed consent.