Thanks for your question. Yes, Fuyan Pill can treat PID and its related complications. It has great effect of clearing away heat and detoxification, activating blood circulation and removing blood stasis, nourishing spleen and disinhibiting dampness, it can regulate women's menstruation, eliminate pain, and treat the inflammation in cervix, uterus, pelvic cavity, ovary and other places of the women reproductive system. Hope this answer helps and best regards