What are some symptoms of polymyoitis?

Polymyositis symptom: Although symptoms of polymyositis would vary based on severity of the disease and the individual, common symptoms include:Common symptoms include: Difficulty swallowing. Muscle pain. Muscle weakness in the proximal muscles (shoulders, hips, etc.) this can make it hard to raise the arms over the head, get up from a sitting position, or climb stairs. Problems with the voice (caused by weak throat muscles) Shortness of breath.