Paget's disease is a chronic bone disorder that disrupts the normal cycle of bone renewal. It leads to enlarged and weakened bones, which can cause pain, deformities, and an increased risk of fractures. The exact cause of Paget's disease is not fully understood, but it may involve genetic factors and viral infections. The condition most commonly affects the pelvis, skull, spine, and legs. Symptoms can vary, with some individuals experiencing no noticeable signs. Diagnosis typically involves imaging tests like X-rays or bone scans, and treatment may include medications to manage symptoms and slow bone remodeling.