Inflammatory myopathy is a group of rare diseases characterized by muscle inflammation and weakness. This condition affects the skeletal muscles, which are responsible for movement, and can lead to difficulties in performing everyday activities. Symptoms may include muscle pain, fatigue, and swelling. There are several types of inflammatory myopathy, including polymyositis, dermatomyositis, and inclusion body myositis. Diagnosis typically involves blood tests, imaging studies, and muscle biopsies. Treatment often includes medications to reduce inflammation, such as corticosteroids, and physical therapy to improve muscle strength and function.