Chronic pelvic pain (CPP) is explained as a complaint of cyclic or non-cyclic pelvic pain lasting for at least six months with or without dysmenorrhea, dyspareunia, dysuria, and dyschezia. The etiology of symptoms can be categorized according to organ system involvement. Gynecological causes typically involve endometriosis-related pain, pelvic congestion syndrome, pelvic inflammatory disease, adenomyosis, hydrosalpinx, etc. Endometriosis-related pain is seldom non-cyclic and may present due to recurrent bleeding in endometriotic implants. Engorgement of veins leads to inadequate venous washout and presents chronic pelvic pain in pelvic congestion syndrome. The pressure effect of benign lesions of the uterus and cervix may lead to cyclic pain, as in uterine fibroids. Often presentation of diseases like hydrosalpinx may not present until it has overdistended or may at times present as acute pelvic pain if it undergoes torsion. Long-standing untreated pelvic inflammatory diseases in sexually active females is another cause of pelvic pain. The complaint of CPP is also shared due to the involvement of the gastrointestinal system in conditions like irritable bowel syndrome, inflammatory bowel diseases, long-standing abdominal hernias, colorectal cancer, etc. Alteration of the gut biome and dysregulated brain-gut associations lead to typical manifestations of chronic lower back pain and pelvic pain in irritable bowel syndrome. Colorectal tumors, when in the advanced stage, may spread to nearby tissues creating fistulas and affecting nearby nerves, causing pelvic, perineal, and sacral pain. Abdominal hernias with small bowel prolapse are always related to pelvic pain symptoms. Infections in the urinary tract like urethral syndrome, chronic prostatitis, and chronic recurrent cystitis present with CPP and voiding problems. Musculoskeletal etiologies, though varying in degrees, are responsible for isolated complaints of CPP. Examples include pelvic girdle pain, levator syndrome, coccygodynia, and pelvic floor prolapse.
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