A good way to understand the many causes of chronic pain is by considering phantom limb pain. When people lose an arm or leg in an accident or surgery, about half of them will still feel that the limb is there. About half of those people develop serious pain in the phantom limb. Obviously, this isn’t due to physical injury going on in the moment. It’s a misunderstanding by the brain of the signals it is getting and not getting. The brain figures the signals add up to something seriously wrong, so it sends out an urgent pain message.
Diabetes is a number of diseases that involve problems with the hormone insulin. Normally, the pancreas (an organ behind the stomach) releases insulin to help your body store and use the sugar and fat from the food you eat. Diabetes can occur when the pancreas produces very little or no insulin, or when the body does not respond appropriately to insulin. As yet, there is no cure. People with diabetes need to manage their disease to stay healthy.