A prospective, randomized, double-blind, multicenter clinical study of Neiyifang in the treatment of congealing cold blood stasis of endometriosis

INTERVENTION: Neiyifang formula granule + Drospirenone and Ethinylestradiol Tablets (?) placebo group:Neiyifang formula granule + Drospirenone and Ethinylestradiol Tablets (?) placebo ;Drospirenone and Ethinylestradiol Tablets (?) +Neiyifang formula granule placebo group:Drospirenone and Ethinylestradiol Tablets (?) +Neiyifang formula granule placebo ; CONDITION: endometriosis PRIMARY OUTCOME: remission rate of EAPP; SECONDARY OUTCOME: CA125;TCM syndrome score;COX‐Menstrual symptom score;VAS, DYS, NMPP of EAPP;EHP‐5; INCLUSION CRITERIA: ? All cases should meet EM clinical diagnostic criteria and TCM diagnostic criteria of congealing cold blood stasis syndrome; ? 18‐40 years old; ? Menstrual cycle between 21 and 35 days, period of 3 to 7 days; (4) VAS score =3, and pain must be continuous or recurrent for at least 6 months; ? Those who voluntarily participated in the experiment and signed the informed consent; ? Those who have not been treated with Western medicine or have been treated with western medicine but have stopped taking medicine for 3 months.