Ovarian torsion is a medical condition that occurs when the ovary twists around the ligaments that support it, cutting off the blood supply. This condition is most common in women of childbearing age, and can be extremely painful. In most cases, the ovary can be untwisted (detorsion) to restore the blood supply and reduce pain. However, if the torsion is not treated quickly, it can cause permanent damage to the ovary and even lead to infertility. The exact cause of ovarian torsion is not known, but several factors can increase a woman’s risk, including: pregnancy, large ovarian cysts, pelvic surgery, and the use of fertility drugs. Symptoms of ovarian torsion include sudden, severe pelvic pain, nausea, vomiting, and tenderness in the lower abdomen. A physical examination and imaging tests, such as an ultrasound or CT scan, can help to diagnose the condition. Treatment of ovarian torsion usually involves an emergency surgery to untwist the ovary and restore the blood supply. In some cases, the ovary may need to be removed if the torsion is severe or if the ovary has been damaged by the lack of blood flow. In addition, medications may be used to reduce pain and inflammation. Long-term complications of ovarian torsion can include fertility problems and the formation of scar tissue in the area.