Dermatomyositis and polymyositis are rare autoimmune conditions that cause progressive muscle weakness, typically starting from the shoulders and extending to the hips and thighs. Dermatomyositis also presents with distinctive skin rashes on areas like the face, knuckles, or eyelids. These symptoms can make everyday activities—such as climbing stairs, lifting objects, or standing from a chair—challenging.

Participation in clinical trials offers access to emerging treatments designed to improve muscle strength, slow disease progression, and enhance long-term quality of life.