People with diabetes commonly develop temporary or permanent damage to nerve tissue. Nerve injuries are caused by decreased blood flow and highblood sugar levels, and are more likely to develop if the levels of blood sugar is not well controlled.
Some people with diabetes do not develop nerve damage, while others may develop this initial condition. On average, symptoms begin 10 to 20 years after diagnosis of diabetes. Approximately 40% of people with diabetes will eventually develop nerve damage.
Peripheral nerve injury can affect the nerves in the skull (cranial nerves) or nerves of the spine and its ramifications. This type of nerve damage (neuropathy) tends to develop in stages.
Autonomic neuropathies affect the nerves that regulate vital functions, including the heart muscle and smooth muscles.