Sometimes life hurts. You rearrange the furniture -- and your back goes out. You can get sprains, strains or bruises playing sports or even playing with your kids. You may have chronic pain. When you go to the drugstore to get relief, though, you may find a dizzying selection of pain-relieving measures and medications, all available without a prescription. Here’s a guide to getting over-the-counter (OTC) help for the hurt.