Doctors aren’t sure what the exact cause of fibromyalgia is, but medical professionals believe its origin comes from a combination of factors. Genetic predisposition to this painful condition might make individuals more susceptible to developing the condition. Physical or emotional trauma, infections, and certain illnesses can trigger fibromyalgia in those who are predisposed. Abnormal pain processing in the brain and central nervous system, which amplifies pain signals, is also believed to play a crucial role in the development of fibromyalgia.