Noted symptoms of pelvic inflammatory disease (PID) include?

Pelvic inflammatory disease (PID) is an infection of the female reproductive organs and is commonly caused by sexually transmitted infections. The hallmark symptoms of PID include pelvic pain and an abnormal vaginal discharge, which can be characterized as being yellow or green, indicating potential infection. The presence of pelvic pain typically arises from inflammation of the pelvic organs, and the discharge often results from the body's immune response to infection.

Other possible symptoms of PID can include fever, painful urination, and pain during intercourse, but the key presenting symptoms that stand out are pelvic pain and vaginal discharge. These symptoms directly relate to the nature of PID as an inflammatory response in the pelvic region due to infection.

In contrast, the other options do not align with the typical symptomatic presentation of PID. Thickened cervical mucus is more characteristic of the normal menstrual cycle and does not necessarily indicate PID. Heavy menstrual bleeding may occur in various gynecological conditions but is not specifically a symptom of PID. Severe headaches are not typically associated with PID and may point to other unrelated conditions. Therefore, pelvic pain and vaginal discharge are the primary indicators of this condition, making them the correct answer.