What are the signs of pelvic inflammatory disease (PID)?
Pelvic inflammatory disease (PID) refers to a group of infectious conditions affecting the upper female genital tract, primarily including endometritis, salpingitis, tubo-ovarian abscess, and pelvic peritonitis. Inflammation may be localized to a single site or involve multiple sites simultaneously; salpingitis and tubo-ovarian inflammation are the most common manifestations. So, what are the signs and symptoms of PID? The following section addresses this question.

What Are the Signs and Symptoms of Pelvic Inflammatory Disease?
1. Lower Abdominal Pain
Lower abdominal pain is commonly associated with gynecological inflammation—and indeed, it is one of the primary manifestations of PID. With thorough and timely treatment of acute inflammation, complete resolution is possible. However, some patients only initiate treatment when abdominal pain becomes severe, and discontinue medication once symptoms subside—leading to chronic inflammation, prolonged disease course, and recurrent episodes.

2. Low Back Pain and Cold Sensation
Low back pain is a relatively common symptom among women. Aside from causes such as fatigue, cold exposure, or lumbar muscle strain, PID is another frequent contributor. PID can impair immune function, allowing inflammation to spread to the pelvic region and trigger neural reflexes that result in low back pain. Initially, affected women may experience only mild dull ache or weakness in the lower back and knees—symptoms often overlooked until the condition progresses significantly, prompting eventual medical consultation.

3. Increased Vaginal Discharge
An increase in vaginal discharge frequently accompanies gynecological inflammation and is often accompanied by lower abdominal discomfort. The presence of pain suggests more advanced disease. When the abdomen feels cool or chilled, vaginal discharge may become slightly more abundant. Therefore, unexplained increases or abnormalities in vaginal discharge often signal underlying gynecological conditions such as PID.
The above outlines the key signs and symptoms of pelvic inflammatory disease. We hope this information is helpful to you.