Showers and baths aren't just for mornings. When you're hurting, stand under or settle into warm water for a few minutes to help soothe and relax you. (If you're over 70 or have heart problems, check with your doctor before getting into a hot tub.)
Try a warm shower or bath before you exercise to help loosen joints and muscles.
Use cool water after exercise to help calm deep, burning pain and reduce inflammation.