Most common symptom of Acute pelvic inflammatory disease:
**Core Concept**
Pelvic inflammatory disease (PID) is a bacterial infection of the upper female reproductive organs, primarily the fallopian tubes, but also the ovaries, uterus, and cervix. It is a significant cause of morbidity in women of reproductive age, often resulting from sexually transmitted infections (STIs) such as Chlamydia trachomatis and Neisseria gonorrhoeae.
**Why the Correct Answer is Right**
The most common symptom of acute PID is lower abdominal pain, which can range from mild to severe and may be accompanied by other symptoms such as fever, irregular vaginal bleeding, and abnormal vaginal discharge. The pain is often exacerbated by movement and can radiate to the back. This symptom is a result of the inflammation and infection of the pelvic organs, leading to activation of nociceptors and release of pain mediators.
**Why Each Wrong Option is Incorrect**
**Option A:** While nausea and vomiting can occur in PID, they are not the most common symptoms.
**Option B:** Fever is a common symptom of PID, but not the most common.
**Option C:** Abnormal vaginal discharge is a symptom of PID, but not the most common.
**Clinical Pearl / High-Yield Fact**
The Centers for Disease Control and Prevention (CDC) recommend that all sexually active women under the age of 25, as well as those with multiple sex partners, be screened annually for Chlamydia and gonorrhea, the two most common causes of PID.
**Correct Answer: D. Lower abdominal pain.**