What is neuropathy?
Neuropathy is a common condition. It is the result of damage to the peripheral nerves of the nervous system. Neuropathy is also known as peripheral neuropathy.
The peripheral nerves spread out from the brain via the spinal cord. They relay nerve impulses and sensory information from the body to the spinal cord and brain. They also carry signals for muscle movement and other functions, such as organ function, from the brain and spinal cord to the rest of the body.
Damage to the peripheral nerves interferes with normal functioning of the peripheral nervous system. Typical symptoms of neuropathy include unusual or abnormal sensations in the extremities. This commonly occurs in the feet.
There can be a wide variety of other symptoms because some peripheral nerves have specialized functions. For example, peripheral nerves control involuntary functions including:
Contraction of the smooth muscles of organs, such as the heart and bladder
- Sexual functions
Diabetes is a very common cause of neuropathy. Neuropathy with diabetes is called diabetic neuropathy. Other causes include certain metabolic disorders, infections, malignancy, inflammation, vitamin deficiencies, toxins, and inherited conditions. The goal of diagnosis is to identify the root cause of peripheral neuropathy.
Neuropathy treatment involves treating the underlying disease, disorder or condition. It may be possible to successfully cure some underlying conditions. In other cases, treatment aims to manage neuropathy pain and other symptoms.
Complications of untreated neuropathy and its underlying causes can be serious. This includes permanent loss of nerve function, muscle wasting, paralysis, serious infections, and gangrene. Seek prompt medical care if you have symptoms of neuropathy, such as changes in sensation, difficulty moving, or any other unexplained or persistent symptoms. Early diagnosis and treatment reduces the risk of permanent nerve damage and serious complications.
Some complications of neuropathy can be life-threatening. Seek immediate medical care (call 911) for symptoms of chest pain, difficulty breathing, or a change in alertness or passing out.
What are the different types of neuropathy?
There are more than 100 kinds of peripheral neuropathy. Doctors classify them using the types of nerves they affect:
Autonomic neuropathies involve nerves that regulate functions you do not consciously control. This includes organ and gland function, such as breathing, digestion and sweating.
Motor neuropathies involve nerves that control skeletal muscles and movement. They affect functions like talking or walking.
- Sensory neuropathies involve nerves that control the sense of touch or position. They can result in diminished or abnormal feelings of touch, pain, temperature or sensation. These neuropathies can also make it hard to coordinate your body and complex movements in space.
Most neuropathies are some combination of the three. Sometimes, neuropathy only affects one type of nerves. Mixed neuropathies often have a predominant nerve type, such as predominantly sensory. The most common type of peripheral neuropathy is a mixed sensorimotor neuropathy.
What are the symptoms of neuropathy?
Neuropathy generally develops slowly, over months, as nerve damage progresses. A wide variety of symptoms can occur, depending on the types of peripheral nerves the neuropathy affects.
Symptoms of neuropathy that affect the nerves of the limbs and muscles
Common symptoms of neuropathy often affect the sensory or motor nerves in the arms and legs. Symptoms include:
Abnormal muscle reflexes
Muscle twitching or cramps
Muscle weakness and atrophy (wasting of muscle tissue)
Poor coordination and balance, leading to falls
Poor muscle control and body movement
Problems with swallowing
Sores or lesions that do not heal, leading to infections
- Unusual sensations, such as pain, numbness, pins and needles, tingling, burning, or prickling, that begin in the feet. In later stages of neuropathy, the hands can be affected as well. In some cases, the abnormal sensations can extend to the arms, legs and trunk.
Other symptoms of neuropathy
Other symptoms can occur with autonomic neuropathy. These symptoms relate to bodily functions, such as sweating, digestion, breathing, and blood pressure.
Symptoms of autonomic neuropathy include:
Blurred vision due to abnormal pupil dilation and constriction
Drop in blood pressure and feeling light-headed
Heat intolerance due to impaired sweating. Excessive sweating is also possible.
Increased heart rate
Problems with urination, such as incontinence and hesitancy with urination
- Sexual dysfunction, such as impotence (erectile dysfunction) and vaginal dryness
Serious symptoms that might indicate a life-threatening condition
Over time, neuropathy can lead to serious and possibly life-threatening complications, such as cardiac arrhythmias and gangrene. Seek immediate medical care (call 911) for any of these symptoms:
What are the stages of neuropathy?
While there are not defined stages of neuropathy, it is a progressive condition. In the early stages, people often have worsening symptoms of pain, burning or numbness. These symptoms usually occur in the nerve endings farthest from the torso. Doctors often refer to the pattern as stockings and gloves because it affects the feet or hands. As the neuropathy progresses, symptoms can start to affect nerves closer to the center of the body.
What causes neuropathy?
Neuropathy is caused by damage to the peripheral nervous system. The peripheral nerves are responsible for relaying messages from the brain and spinal cord to the rest of the body. Widespread nerve damage can result from nerve compression, metabolic disorders, infections, malignancy, inflammation, vitamin deficiencies, toxins, inherited conditions, and other abnormal processes.
A common cause of neuropathy is diabetes. Uncontrolled diabetes causes chronically elevated high blood sugar levels that interfere with adequate blood flow to nerves over time. Neuropathy can also be caused by long-term pressure or compression of a nerve or nerves.
What are the risk factors for neuropathy?
A number of factors increase your risk of nerve damage and neuropathy. Risk factors include:
Alcohol abuse disorder
Certain medications, including chemotherapy
Chronic nerve degenerative conditions (multiple sclerosis)
Exposure to certain toxins, such as insecticides, lead, mercury, glues, solvents and arsenic
Long-term pressure on a nerve due to such conditions as a tight cast, a long surgical procedure, or carpal tunnel syndrome
- Vitamin B deficiency and vitamin E deficiency
How do you prevent neuropathy?
You may be able to prevent or lower your risk of neuropathy and permanent nerve damage by:
Avoiding exposure to toxins, such as insecticides, lead, mercury, glues, solvents and arsenic
Not drinking alcohol or limiting alcohol intake to one drink per day for women and two drinks per day for men
Seeking regular medical care throughout your life and following your treatment plan for diseases and disorders, such as diabetes, hypothyroidism, vasculitis, and other diseases and conditions that can cause neuropathy
Taking frequent breaks and using proper techniques for repetitive activities that can cause pressure or compression of a nerve, such as keyboarding or using a jackhammer
- Using proper technique when using crutches and notifying your healthcare provider if a cast is too tight or if other orthopedic devices cause discomfort
What are some conditions related to neuropathy?
There are several underlying conditions related to neuropathy. However, diabetes is the leading one. Up to 70% of people with diabetes have peripheral nerve damage of some sort. The damage ranges from mild to severe. It can affect all three types of peripheral nerves: autonomic, motor and sensory. Nerve damage is the result of consistently elevated blood sugar levels that leads to inadequate blood circulation and oxygenation.
The risk of developing neuropathy with diabetes increases with age and the length of time you have had diabetes. Controlling your blood sugar levels is the most important step you can take to prevent it or slow its progression.
How do doctors diagnose neuropathy?
To diagnose neuropathy, your doctor will take a medical history, perform an exam, and order testing. Questions your doctor may ask about your symptoms and medical history include:
What symptoms are you experiencing?
When did your symptoms start? Did they start gradually or suddenly?
Are your symptoms constant or do they come and go?
How severe are your symptoms? Do they interfere with daily activities?
What, if anything, seems to make your symptoms better or worse?
Do you have a family history of nerve problems or nervous system disorders?
What other medical conditions do you have?
- What medications do you take?
The exam will include a neurological evaluation. Your doctor will check your muscle strength, reflexes, posture, and your ability to feel sensations. Your doctor may also need to observe you walking to evaluate your gait and coordination.
Tests to diagnose neuropathy
Tests your doctor may order include:
Blood tests to check for underlying conditions, such as diabetes
Imaging exams, including CT (computed tomography) and MRI (magnetic resonance imaging), to look for problems with the spine, bones or blood vessels
Nerve function tests, including electromyogram (EMG), a nerve study to evaluate how well your nerves send signals and how your muscles respond to them. Other tests include nerve conduction test, sensory tests, and sweat testing.
- Skin or nerve biopsies to take a tissue sample for microscopic examination. In a skin biopsy, doctors are looking for nerve endings in a patch of skin.
How do you treat neuropathy?
Treatment plans for neuropathy depend on the underlying cause, coexisting diseases, and complications. Treatment generally involves a multifaceted plan to address the underlying cause, minimize pain and abnormal sensations, and reduce the risk of complications. The goal is to help you achieve and maintain an independent and active life.
In addition to treating the underlying cause of neuropathy, treatment may include:
Medications to relieve pain, inflammation, and other symptoms, including pain relievers, anti-seizure medicines, and antidepressants
Physical therapy and occupational therapy to maintain and increase your strength and function and relieve symptoms
Surgery to relieve pressure on a damaged nerve
- Walkers, canes, and other assistive devices, such as grab rails in the bathroom, to maintain your independence and maximize safety
Home remedies for neuropathy
Self-care for neuropathy focuses on living a healthy lifestyle. Regular exercise is one of the main strategies in this regard. It can help relieve pain and improve muscle strength and tone. For people with diabetes, it has the added benefit of helping control blood sugar levels. Talk with your doctor about the types and amount of exercise that are safe for you.
Other self-care tips include quitting smoking, limiting alcohol, and eating a healthy diet with plenty of whole grains and fresh fruits and vegetables. Ask your doctor if vitamin supplements would be useful in treating your neuropathy. If you have diabetes, daily foot care is essential. Ask your doctor for specific recommendations to keep your feet healthy.
Alternative treatments for neuropathy
Many people seek out alternative or complementary treatments to manage symptoms and diseases. Acupuncture is a popular choice for people with painful disorders. This therapy is generally safe when you work with an experienced practitioner.
There are several other potential alternative therapies for neuropathy. This includes alpha-lipoic acid, various herbal supplements, and amino acids, such as l-carnitine. Research on these types of supplements is generally inconclusive as far as effectiveness. Supplements can also cause side effects and drug interactions. Talk with your doctor before starting an alternative supplement to make sure you can safely take it.
How does neuropathy affect quality of life?
Research consistently shows that neuropathy affects quality of life. Pain is the symptom with the biggest influence on quality of life. About two-thirds of people with peripheral neuropathy have pain, regardless of the underlying cause.
Pain is the most physically disabling symptom. It also leads to the most decline in mental health and well-being. The more intense the pain is, the more it lowers quality of life. Early diagnosis and treatment can reduce the detrimental effect neuropathy has on quality of life.
Your doctor will likely assess your quality of life on a regular basis if you have neuropathy. Tell your doctor if you notice a change in your stress or sleep or if you begin to experience symptoms of anxiety or depression. Treating pain and other neuropathy symptoms can improve these aspects of quality of life.
What are the potential complications of neuropathy?
Untreated neuropathy can lead to serious complications. Following the treatment plan you and your healthcare provider develop specifically for you will minimize the risk of complications including:
Adverse effects of treatment for neuropathy
Choking due to problems with swallowing
Gangrene and amputation
Incontinence (of the bladder and bowel)
Permanent loss of nerve function
Permanent physical disability
- Poor wound healing and infection