Researchers have been a bit stumped as to the exact cause of fibromyalgia but they have some theories that may increase the risk of the syndrome. Many believe that it is a combination of several factors that, when combined, create the painful and life-disrupting disease. Some doctors think that it could be caused by a previous trauma or illness or a bacteria that infected the body. Others have linked stress to fibro and increased stress seems to aggravate the symptoms. It could also be a hormonal or chemical imbalance, possibly created by a genetic flaw, that increases the amount of pain felt by the body.
Serotonin is a chemical found in the brain that serves to relax and help de-stress the body and could be lowered in patients with fibromyalgia. This would lead to a lower pain threshold and ultra sensitivity to pain and touch. It is also thought that patients may have lower levels of endorphins, which serve as pain killers, and increased levels of "substance P", which amplifies pain. Current research is attempting to define a cause for ICD 9 code 729.1, or fibromyalgia, but there has been no concrete result that can point directly to one source. Unfortunately, fibromyalgia is a difficult disease to diagnose and research, and better cures will not become available until the root cause is discovered. Further information about fibromyalgia ICD 9 medical code 729.1 is still be investigated, but the current medicine can certainly improve the symptoms.