Why does baofukang suppository bleed?

I have bacterial vaginitis and cervical erosion, which was cured with Baofukang suppository. At first it was yellow-green leucorrhea, but the vagina stopped itching. I continue to use it. A little blood flowed out on the sixth day, and it was gone in about three days. Fortunately, my friend used it before. Tell me it's a drug, so I won't worry. It's all right now. Long-term use of 1 capsule for prevention. This medicine is said to be suitable for pregnant women and should be safe. My colleagues and I used it and felt very satisfied.