Your body has several autonomic processes. These are the automatic functions of your body that happen without your thinking or even being aware of them. They include things like sweating, digestion, blood pressure control, etc. Autonomic nerve fibers carry autonomic signals. Disruptions in autonomic signals mean your body’s automatic processes can’t work correctly. Some may work off and on, while others may not work at all.   Autonomic symptoms of peripheral neuropathy can include:   Blood pressure changes. Your body automatically manages blood pressure, but damage to your peripheral nerves can disrupt this. That can cause sudden drops in blood pressure or increases in heart rate, especially when you stand up. Sweating too much or not enough. Your body automatically manages its internal temperature, using sweating to shed heat. Peripheral nerve damage can cause you to sweat too much or not enough. That can lead to dryness and scaling on your feet, or excessive sweating after eating. Bowel and bladder problems. Autonomic signals control your bowel and bladder without you having to think about them. Nerve fiber disruption can affect bowel movements (constipation or diarrhea), and can occasionally affect bladder control, too. Sexual dysfunction. Your autonomic nervous system controls sexual arousal. That’s why autonomic problems can cause sexual dysfunction. Other symptoms. Autonomic changes from peripheral neuropathy can also cause skin color changes, swelling, changes in the pupils of the eyes and blurry vision.