Pelvic inflammatory disease (PID) is a common sexually transmitted infection affecting the upper genital tract, primarily caused by organisms such as Chlamydia trachomatis and Neisseria gonorrhoeae. Risk factors include being under 25, multiple sexual partners, and having a history of PID; untreated PID can lead to serious complications like infertility and chronic pelvic pain. Immediate assessment and broad-spectrum antibiotic treatment are crucial for effective management, alongside education on prevention and sexual health.