Myopathy refers to a group of diseases that affect the muscles, leading to weakness and dysfunction. These conditions can be caused by genetic factors, autoimmune disorders, or exposure to certain medications. Symptoms often include muscle weakness, cramps, and fatigue, which can impact daily activities. There are various types of myopathy, including muscular dystrophy and inflammatory myopathy. Diagnosis typically involves blood tests, imaging studies, and sometimes a muscle biopsy. Treatment options may include physical therapy, medications, and lifestyle changes to help manage symptoms and improve muscle function.