If your period does not come and you only have brown discharge, consider the following reasons: 1. Pregnancy: women who have sex should first rule out pregnancy, because pregnancy may also appear coffee-colored, brown discharge, possibly pre-miscarriage or spontaneous abortion. 2. Hormonal abnormalities: if you are not pregnant, you generally have menstrual disorders, just coffee-colored discharge, maybe the ovaries are not functioning well, so you can check the The level of sex hormones, ultrasound to monitor the follicles to see the number, size and growth of follicles, and can also check the anti-Mullerian hormone, through these several tests, a comprehensive assessment of ovarian function. If the ovarian function is good, you can observe it or use traditional Chinese medicine to regulate it. If the ovarian function is not good, you need to treat with estrogen and progestin supplementation. Of course, a medical examination should be done before using estrogen and progestin, and contraindications to estrogen and progestin application should be excluded before using them.