While I wouldn't say symptom more major risk factor... PID or pelvic inflammatory disease is any infection, that has spread to the upper reproductive tract; the Ovaries, Uterus, and Fallopian tubes. This infection depending on how long and severe it is can cause scarring or fibrosis of the tract. If this happens women are at extreme risk of ectopic pregnancies (eggs that attach to a place that isn't the uterus) or infertility, mainly because connection with the uterus can't or is obstructed. Additionally chronic pelvic pain is also a very real circumstance, of an risk factor.
The acute symptoms however do include extreme pain (acute), and painful urination.