When nerve damage takes place, the nerves that control sensation, are damaged. This can lead to loss of sensation in that part of the body or to unsteadiness, pain and numbness. This type is known as peripheral neuropathy.
Autonomic neuropathy could damage the nerves that control automatic body functions, such as your digestive and urinary systems. Symptoms of autonomic neuropathy could include constipation, vomiting, diarrhoea, impotence and difficulty urinating. - (Health24, February 2010)