Muscle pain is most frequently related to tension, overuse of muscles, or muscle injury from exercise or work that is physically demanding.  In these situations, the pain tends to involve specific muscles and starts during or just after the activity.  It is usually obvious which activity is causing the pain.  Muscle pain also can be a sign of conditions affecting your whole body, like some infections including flu and disorders that affect connective tissues throughout the body such as lupus erythematosus.  One common cause of muscle aches and pain is fibromyalgia, a condition that includes tenderness in your muscles and surrounding soft tissues, sleep difficulties, fatigue and headaches.  Unfortunately, there is no known fibromyalgia treatment because the disorder itself is not clear and a phenomenon to science.  But its signs and symptoms can be treated and alleviated.  Fibromyalgia and muscle aches due to overuse often respond well to massage.  Gentle stretching exercises after a long rest period are also helpful.  For muscle pain from injury, rest that body part and take over the counter acetaminophen or ibuprofen.  Apply ice for the first 24 to 72 hours of an injury to reduce pain and inflammation. After that, heat often feels more soothing.  Regular exercise can help restore proper muscle tone.  Walking, cycling, and swimming are good aerobic activities to try. A physical therapist can teach you stretching, toning, and aerobic exercises to feel better and stay pain-free.  Begin slowly and increase workouts gradually.  Avoid high impact aerobic activities and weight lifting when injured or while in pain.