Symptoms

With a peripheral nerve injury, you may experience symptoms that range from mild to seriously limiting your daily activities. Your symptoms often depend on which nerve fibers are affected:

• Motor nerves. These nerves regulate all the muscles under your conscious control, such as walking, talking, and holding objects. Damage to these nerves is typically associated with muscle weakness, painful cramps and uncontrollable muscle twitching.
• Sensory nerves. Because these nerves relay information about touch, temperature and pain, you may experience a variety of symptoms. These include numbness or tingling in your hands or feet. You may have trouble sensing pain or changes in temperature, walking, keeping your balance with your eyes closed or fastening buttons.
• Autonomic (aw-tu-NOM-ik) nerves. This group of nerves regulates activities that are not controlled consciously, such as breathing, heart and thyroid function, and digesting food. Symptoms may include excessive sweating, changes in blood pressure, the inability to tolerate heat and gastrointestinal symptoms.

You may experience a range of symptoms because many peripheral nerve injuries affect more than one type of nerve fibers.

When to see a doctor

If you experience weakness, tingling, numbness or a total loss of feeling in a limb, see your doctor to determine the cause. It's important to treat peripheral nerve injuries early.