Fibromyalgi is a chronic disorder characterized by widespread musculoskeletal pain, fatigue, and tenderness in localized areas. Pain can be chronic, diffused, sharp, throbbing, or severe in the muscles, abdomen, back, elbow, or neck. There may also be muscle tenderness, delayed onset  soreness, irregular sleep, moodiness, anxiety, or forgetfulness. Fibromyalgia can be treated with medication, talk therapy, and stress reduction.