NEW YORK (Reuters Health) - Daily injections of growth hormone may help reduce pain and improve the quality of life in some patients with fibromyalgia, new findings of a small study suggest.Fibromyalgia, which causes muscle pain and fatigue, is seen more often in women than in men. Muscle spasm and tightness can often be elicited by depressing certain “trigger points” overlying the muscles. The cause of fibromyalgia is unknown, but stress, poor sleep, injury, infections, and other conditions have been linked to the disorder.