Adenomyosis is a condition in which the inner lining of the uterus (the endometrium) grows into the muscular wall of the uterus (the myometrium). This abnormal tissue growth can cause the uterus to enlarge and lead to symptoms such as heavy or prolonged menstrual bleeding, severe cramping, pelvic pressure, and bloating. The condition often overlaps with fibroids or endometriosis and can negatively affect fertility. Diagnosis may involve pelvic ultrasound or MRI, and treatment options range from hormonal therapies to hysterectomy, depending on severity and reproductive goals.