Sometimes you may have felt a sudden tingling sensation in your fingers, or a sharp pain down your leg. Today we are talking about this kind of discomfort that is limited to one place, one side of the body. Maybe you have been suffering from this for a long time. So let's see what this is called in medical science, why this happens, and what can be done about it.
Simply put, what is Mononeuropathy?
When you hear the word mononeuropathy, you may think it is a very serious disease. But its meaning is very simple. "Mono" means "one", "Neuro" means "nerve", and "pathy" means "disease". In simple terms, mononeuropathy is when there is damage to a single nerve in our body.
Think of our body as a big building. The main control room of this building is the brain and spinal cord. From this control room, there is a system of wires that carry electrical messages to all parts of the building. That system of wires is our nervous system. In mononeuropathy, what happens is that only one wire in this system of wires is damaged.
This damage can occur in two ways.
1. Damage to the protective covering around the nerve (like the plastic sheath around a wire). We call this `(Myelin sheath)`.
2. Damage to a part of the nerve cell itself (the ``Axon'').
Whatever the damage, the messages that travel through the nerve don't travel properly. As a result, we start to feel things like pain, numbness, and muscle weakness.
What nerves are most commonly affected by this condition?
Actually, any single nerve in our body can be damaged in this way. But there are some nerves that are more likely to be damaged depending on where they are located (especially nerves that run close to the skin or to a bone). Some of these conditions even have special names. You may have heard these names before.
| Affected nerve and condition | A simple explanation |
|---|---|
| Median Nerve (Carpal Tunnel Syndrome) | This is common in people who spend a lot of time typing on a computer, sewing, cycling, or doing other work that puts constant strain on their wrists. They experience tingling and pain in the fingers, such as the thumb, index finger, and middle finger. |
| Sciatic Nerve (Sciatica) | In our villages, this is also called 'Riri Yakage's pain'. The main symptom is a severe pain that runs from the back through the buttocks down the back of the leg. This can occur after lifting a heavy object or sitting in an incorrect position. |
| Ulnar Nerve (Ulnar Nerve Entrapment) | When you work for a long time with your elbow on a desk, do you feel like your little finger and half of your ring finger are tingling? That's because this nerve is being compressed. |
| Radial Nerve (Radial Tunnel Syndrome) | It is caused by pressure on the upper part of the hand. Sometimes, it can be difficult to straighten the wrist. |
| Peroneal Nerve | This nerve can be damaged by standing with one leg crossed for a long time, or by a hard blow to the knee. This can cause the inability to lift the toes (foot drop). |
| Facial Nerve (Bell's Palsy) | This is a condition that affects a nerve (`(Cranial Nerve)`) that comes directly from the brain. Suddenly, one side of the face becomes lifeless, and one corner of the mouth turns down. Although many people are frightened by this, it is often a treatable condition. |
The important thing is that sometimes two or more nerves in unrelated areas of the body can be damaged at the same time. This is called ``Multiple Mononeuropathy''.
What are the symptoms of this?
Symptoms depend on which nerve is affected and the extent of the damage , but there are some common symptoms.
- Numbness and tingling: Reduced or complete loss of sensation in the affected area. It feels like you've been given anesthesia.
- Pain or burning: The pain may feel like burning, stabbing, or electric shock.
- Pins and needles sensation: This is a very common symptom. We call it "pins and needles". The medical name for this is ``Paresthesia``.
- Muscle weakness: The muscles controlled by the corresponding nerve become weak. For example, if a nerve in the hand is damaged, you may not be able to grip something firmly with your hand, or you may drop objects. Over time, these muscles may also become thin (Muscle Atrophy).
If you have these symptoms, don't ignore them as normal. Be sure to see a doctor for advice. If treatment is delayed, it can lead to chronic pain, permanent loss of sensation, or paralysis .
Why is this happening? What are the reasons?
There are three main categories of causes of mononeuropathy.
1. Injuries
This is the most common cause: direct damage to a nerve.
- Continuing to make the same movement: For example, someone who types in the same way all day, or someone who uses their hands in the same way in a garment factory.
- Overstretching a joint: This can happen at times, such as when playing sports.
- Fracture: When a bone in an arm or leg breaks, a nerve that runs near that bone can be damaged.
- Surgery or a cut with a sharp instrument: A nerve can be severed during surgery or in an accident.
- Radiation therapy for cancer: These treatments can damage nerves.
2. Nerve Compression
A nerve being compressed by surrounding tissue or something else.
- Tumor development: A tumor can form near a nerve and press on it.
- Excessive swelling (`Edema`): Swelling caused by an injury or other medical condition can compress nerves.
- A tight cast: If the cast (used to wrap a broken limb) becomes too tight, it can compress the nerves inside.
- Improper use of crutches: When crutches are used with the weight of the crutches placed directly on the armpit, the nerves that run under the armpit can be compressed.
- Bad posture: Working in the garden on your knees for a long time, crossing your legs, or hunching your elbows on the table can cause pinched nerves.
3. Other Health Conditions
Mononeuropathy can also be caused by certain medical conditions, but these conditions are more likely to damage more than one nerve.
- Diabetes: When diabetes is uncontrolled, high blood sugar levels can damage nerves over time.
- Immune system diseases: In diseases like Lupus and Rheumatoid Arthritis, our own body's immune system can attack the nerves.
- Some infections: Infections like HIV and herpes (`Shingles`) can damage the nerves.
- Vitamin deficiencies: A deficiency in vitamins, especially those in the B group, can affect nerve function.
- Alcohol use disorder: Long-term heavy drinking is toxic to the nerves.
How do you find this, Doctor?
In most cases, an experienced doctor can diagnose this condition by listening to your symptoms and examining you.
- Asking about your medical history: The doctor will ask about other medical conditions you have (such as diabetes), your occupation, and any recent accidents.
- Physical and nervous system examination: Your muscle strength, sensation, and reflexes are checked.
However, sometimes if the cause is not clear, or if the symptoms are severe, the doctor may recommend some special tests to confirm further.
- EMG (Electromyography): This is done to look at how electrical signals travel from the nerves to your muscles.
- Nerve Conduction Study: This measures the speed at which an electrical signal travels along a nerve. If a nerve is damaged, this speed decreases.
- Blood tests: To check for diabetes, vitamin deficiencies, or other medical conditions.
- Imaging Tests: You may be asked to do an ultrasound, MRI, or CT scan to see if the nerve is being compressed by a tumor or another cause.
What are the treatments for this?
Treatment depends on the type of nerve damage, the cause, and the severity of your symptoms. Your doctor will determine the treatment that is best for you.
- Rest and painkillers: In the early stages, the only treatment is to avoid activities that put pressure on the nerve and take painkillers.
- Splints: Especially in conditions like Carpal Tunnel Syndrome, a splint is often recommended to immobilize the wrist. This gives the nerve a break.
- Steroid injections: A steroid injection can be given to reduce swelling around the nerve and relieve the pressure.
- Physical therapy: Special exercises performed under the guidance of a physical therapist can strengthen muscles, reduce pain, and restore joint mobility.
- Treating the underlying condition: If this condition is caused by diabetes, it is essential to keep the diabetes well controlled.
- Surgery: If other treatments do not help, and the nerve is severely compressed, a minor surgery may be necessary to relieve the compression.
Take-Home Message
- Mononeuropathy is damage to only one nerve in our body. This is not a serious condition to be afraid of, but it is not something to ignore either.
- The main symptoms are tingling, pain, inflammation, and muscle weakness in one area of the body.
- Working in the same position continuously, accidents, nervous tension, and medical conditions such as diabetes can be the main causes of this.
- It is very important to see a doctor as soon as symptoms begin. The sooner treatment is started, the better the chance of a full recovery.
- This condition can be successfully managed with rest, painkillers, physical therapy, and sometimes surgery.
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