Really the only chronic pain we deal with is chronic TMD. There have be a plethora of creative “solutions” in dealing with this condition, nearly all are only temporary fixes. To learn more about chronic TMD, it’s causes and it’s treatments one must look at how chronic pain in the body works. The study linked here is interesting because it links the neruo system and the immune system through control and application of the inflammation processes that occur within our bodies. They discovered a previously unknown cholinergic anti-inflammatory pathway.
Turns out stimulation of the vagus nerve may control a wide range of previously very difficult condition to control. Severe depression and epilepsy are 2 conditions that have been successfully treated so far.