Subserosal fibroids are noncancerous growths that develop on the outer wall of the uterus. As they grow, they can press against nearby organs, causing pelvic pain, abdominal pressure, bloating, constipation, frequent urination, and lower back pain. Learn about subserosal fibroid symptoms, causes, diagnosis, and minimally invasive treatment options like Uterine Fibroid Embolization (UFE).