What is myalgia Thu, Apr 08, 10 06:46PM by roman Myalgia means muscle pain. Overuse and straining of muscle can cause mayalgia.Influenza or lyme disease can also cause myalgia. TAGS: 1. what is myositis 2. what is asthenia 3. what is prostration 4. what is dyspnea 5. what is myofascitis