Sometimes you try to ignore it. Tough it out. Play through it. Take an extra aspirin or pain killer. But sometimes, muscle pain just won’t go away and eventually overwhelms you. You can feel the pain in your lower back when you remember the patient you lifted as part of your job. Or when you swung a hammer that afternoon and felt a radiating pain by closing time. Now, it’s the next day. Or the day after. And the pain’s still there. The pain’s still real. And it won’t go away.