Overview

Peripheral nerve disorders are conditions that affect nerves outside the brain and spinal cord. These nerves send sensory information to the brain, motor commands to muscles, and control functions such as heart rate and digestion. When peripheral nerves are damaged or not functioning properly, the signals they carry are disrupted, leading to weakness and changes in sensation. Mononeuropathy affects only one nerve; mononeuritis multiplex affects several nerves in different locations; and polyneuropathy affects many nerves throughout the body. They can happen at any age, quickly or slowly.

Symptoms
The symptoms depend on which nerve is hurt. When sensory nerves are involved, they often cause numbness, tingling, burning, or sharp pain, usually starting in the hands or feet. Motor nerve damage may lead to muscle weakness, cramps, reduced coordination, or muscle wasting. When the autonomic nerves are involved, you may feel dizzy when you stand up, sweat too much, have digestive problems, or your heart rate and blood pressure may change. If left untreated, symptoms can worsen over time and make it hard to do everyday things.

Causes
Many factors can cause peripheral nerve disorders. Diabetes, physical injury or nerve compression, infections, autoimmune diseases, and vitamin deficiencies are some of the most common causes. Long-term drinking, kidney disease, and being around toxins can damage nerves. Some drugs, such as chemotherapy drugs, are known to affect peripheral nerves. In certain individuals, a definitive cause cannot be determined, a condition known as idiopathic peripheral neuropathy.

Diagnosis
To make a diagnosis, the doctor first takes a detailed medical history and does a neurological exam to check strength, sensation, and reflexes. Blood tests are used to detect underlying conditions such as diabetes or nutrient deficiencies. Electromyography and nerve conduction studies are two tests that can help you check how well your nerves and muscles work. Imaging tests may be performed if there are signs of nerve compression or structural abnormalities.

Treatment
The goal of treatment is to find and treat the root cause and the symptoms. It is very important to keep chronic diseases like diabetes under control. Doctors may give you medicine to help with nerve pain and discomfort. Physical therapy can help strengthen your muscles, improve your balance, and enhance your coordination. Surgery may be needed if the nerves are compressed. Eating well, staying away from alcohol, and managing your risk factors make it easier to take care of your nerves. Early and ongoing treatment can slow the disease's progress and make daily life easier.