Do you feel an unbearable pain or burning sensation when your clothes rub, when a breeze blows, or when a friend gently pats you on the shoulder? If you feel severe pain even from a very light touch that does not actually cause pain, you may have this condition. Today we are talking about this strange, but very common, painful condition that affects many people, allodynia.
What exactly is Allodynia?
Simply put, allodynia is the feeling of pain from something that normally doesn't cause pain. Imagine a bird feather touching your skin. We normally feel a very gentle, pleasant sensation , right? But for someone with allodynia, it feels like a sharp pain, like a knife stabbing.
This is medically known as neuropathic pain . This means that it is not a problem with your skin, but rather a problem with the nervous system that carries the sensation of pain to the brain. It is often a symptom of another condition. For example, it is commonly seen with conditions such as diabetes, herpes, fibromyalgia, and migraines.
Many people with allodynia say that their skin feels "very sensitive, like they've been sunburned." For some people, this pain can feel like a knife, a needle, or a burning sensation, like the skin is burning.
What are the main types of Allodynia?
This condition can be divided into three main types depending on how it occurs. Let's understand this with a table.
| Type of Allodynia | Simply put, this is what happens (What it means simply) |
|---|---|
| Dynamic Allodynia | Pain when something moves on the surface of the skin. For example, clothing rubbing against the body, bedsheets hitting the body. |
| Tactile Allodynia | Pain caused by very slight touch or pressure. For example, shaking someone's hand, someone touching your head. |
| Thermal Allodynia | Pain caused by slight changes in temperature. For example, when you go out of an AC room, or when a drop of cold water touches your skin. |
Why is this happening to us? What is the reason?
The main reason for this is a defect in the pain processing of our nervous system. We call this `Central Sensitization`.
Think of your body as a high-security zone, and your nervous system is its security system. When you touch something hot, the sensors in your nervous system send a signal to your brain saying, "Danger!" At that moment, the security system goes off, you feel pain, and you pull your hand away. This is the normal process.
But a medical condition, an accident, or some medications can disrupt the functioning of this defense system. Then, the alarm starts to sound even when there is no danger. Just like a security alarm going off without a thief coming. A piece of clothing rubbing against the body is not a danger, but the disturbed nervous system misinterprets it as a "danger" and sends pain signals to the brain. That is what happens in a state of allodynia.
Conditions that can cause allodynia
- Diabetes-related neuropathy
- Fibromyalgia
- Migraines
- Post-herpetic neuralgia (pain after herpes infection)
- Multiple Sclerosis (MS)
- Complex regional pain syndrome (CRPS)
- Trigeminal neuralgia (TN)
- Alcohol use disorder
- Vitamin D or vitamin B deficiency
- Some cancer treatments (Chemotherapy, Radiation therapy)
- Nerve damage after an accident (e.g., a deep cut) or surgery (e.g., removal of a limb)
How do you find this, Doctor?
When you report symptoms like these, the first thing your doctor will do is ask about your complete medical history and examine you.
- What does the pain feel like? (Stinging? Burning?)
- When will it increase?
- What do you do to reduce pain?
- What other medications do you take?
After asking questions like these, they will ask you to rate the intensity of the pain from 0 to 10. After that, they may do some tests to find out exactly what is causing it.
- Blood tests (e.g. Complete Blood Count)
- Urine tests
- MRI or CT scan tests
- Tests that measure nerve function - EMG (Electromyogram) and NCS (Nerve Conduction Study)
Is there no treatment for this pain?
There definitely is. The key to treatment is to identify and treat the underlying condition that is causing the allodynia. For example, if it is caused by diabetes, it is essential to control the diabetes well.
If no cause can be found or if the pain persists despite treatment for the underlying condition, there are various ways to manage the pain. Your doctor will choose the treatment plan that is best for you.
| Treatment Method | Let's learn about this. |
|---|---|
| Oral Medications | There are specific medications for nerve pain. Medications like Pregabalin, Gabapentin, and some antidepressants are commonly used for this. Medications like Triptans are given for allodynia caused by migraines. |
| Topical Medications | There are creams, lotions, or patches that can be applied to the area of pain. Examples include ointments containing lidocaine and capsaicin. These temporarily numb the skin surface and reduce pain. |
| Physical Therapy (PT) | This is a process called 'desensitization'. The therapist will first touch your skin very gently, gradually increasing the pressure. Over time, your nervous system will become accustomed to the touch, and the pain will go away. |
| Counseling & Therapy | Living with constant pain can be mentally exhausting. Counseling is very important to manage the stress and anxiety that this causes. Methods such as Cognitive Behavioral Therapy (CBT) teach you how to deal with pain. |
| Injections | Injections such as a nerve block can be given to temporarily deactivate the nerve or nerve fiber that is causing the pain. |
| Surgery | If no other treatments are successful, surgery such as Spinal Cord Stimulation may be considered. This involves inserting a small device into the spinal cord to block pain signals from reaching the brain. |
Can't this situation be prevented?
It may not be possible to completely prevent allodynia, as it is a symptom of another condition. However, we can reduce the risk of developing the main conditions that cause allodynia.
- Stay active: Regular exercise reduces stress, reduces migraines, and helps control diabetes.
- Maintain a healthy weight: Obesity is a major risk factor for diabetes.
- Be aware of your family history: If anyone in your family has diseases like diabetes, MS, or fibromyalgia, talk to your doctor about it.
- Get vaccinated: Seek medical advice about getting the necessary vaccinations to protect against the herpes virus.
- Eat a balanced diet: Eat a diet rich in fruits and vegetables to avoid vitamin deficiencies.
The most important thing is, if you experience this kind of pain, don't ignore it. Don't think, "This is just a mental problem." This is a real medical condition that needs to be treated.
How difficult it is to be in pain, unable to hold your child or loved one, unable to even put on clothes? So if you have these symptoms, especially if they are interfering with your daily life, be sure to see a doctor for advice.
Take-Home Message
- Allodynia is the sensation of severe pain from a touch that normally does not cause pain.
- This is not a psychological problem, but a real pain caused by a defect in the nervous system (Neuropathic Pain).
- Often, this occurs as a symptom of another medical condition, such as diabetes, fibromyalgia, or migraines.
- If you have these symptoms, don't ignore them and definitely see your doctor to find the cause and get treatment.
- This condition can be successfully controlled by treating the underlying disease causing the pain and using pain management techniques.
👩🏽⚕️ Additional questions (FAQs)
💬 What disease is Cholestyramine Resin / Questran powder used for?
This is not a regular cholesterol pill (Statin)! This is a special type of drug (Bile Acid Sequestrant) that is given to reduce 'bad cholesterol (High LDL)'. Doctors also use it to immediately stop 'unbearable itching (Pruritus) of the body/skin' due to liver disease/biliary obstruction and to control some severe diarrhea conditions.
💬 How does this powder (Cholestyramine) dissolve bad cholesterol/stop it from building up when you drink it with water?
Our liver makes new cholesterol every day and produces 'bile acids', which then go to the intestines and are recycled back to the liver. When you drink this medicine, it goes to the intestines and absorbs that 'bile' like a sponge, clogs it up and passes it out with your stool. When the bile runs out, the liver has no other choice but to absorb the cholesterol/LDL in your blood and make new bile. That bile will stop you from scratching your body.
💬 What are the most annoying and dangerous dangers to be aware of when taking this medicine (Questran)?
The biggest problem is that this causes severe 'Constipation'! Some people can even get a fecal impaction. The other most dangerous danger is that while this is in the intestines, 'any other pills (Painkillers, Thyroid, Vitamins)' you take will not be absorbed into the blood! Therefore, other medications should be taken either an hour before or 4 hours after taking this.
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