Nerve Issues: Numbness, Cold Sweats, and Nausea Explained - Neurology

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Numbness in the hands and feet, accompanied by cold sweats and a feeling of nausea?


Hello, doctor.
In the past month, whenever I take a bus, I experience nausea, cold sweats, and tingling in my hands and feet.
These episodes last about 10-15 seconds and occur 3-4 times during a one-hour trip.
The sensations are even more intense when I drive; the tingling spreads from my torso to my limbs, and it feels like I might faint at any moment.
Now, I’m afraid to drive… After these episodes, I feel particularly fatigued and weak, and my heart rate becomes noticeably elevated.
Could you please help me understand what might be causing these symptoms, such as tingling in my limbs, fatigue, cold sweats, headaches, weakness, and nausea?

MY, 20~29 year old female. Ask Date: 2018/08/06

Dr. Jiang Junyi reply Neurology


Hello: Your symptoms are more indicative of hyperventilation syndrome.
When this occurs, it leads to a decrease in carbon dioxide levels in the blood, resulting in an increased pH level, which triggers systemic reactions and symptoms.
Common manifestations include dizziness and numbness (especially around the lips and upper limbs) due to reduced blood flow to the brain, as well as weakness.
In more severe cases, agitation, hallucinations, and fainting may occur.
A decrease in blood calcium can lead to muscle spasms and cramps in the hands and feet.
Low carbon dioxide levels often make patients feel short of breath.
There are many causes of hyperventilation, including lung diseases, smoking, and even anxiety leading to panic attacks.
It is advisable to consult a neurologist for further evaluation and treatment.
Wishing you good health and peace.
Dr.
Jiang from Taoyuan Medical Center cares about you.

Reply Date: 2018/08/06

More Info


The symptoms you are experiencing, including numbness in your hands and feet, cold sweats, nausea, fatigue, and a racing heartbeat, can be concerning and may have multiple underlying causes. It’s important to approach this situation with a comprehensive understanding of potential medical issues.

Firstly, the combination of symptoms you describe could be related to several conditions, including anxiety, panic attacks, or even a vasovagal response. Anxiety can manifest physically, leading to symptoms such as nausea, sweating, and feelings of numbness or tingling in the extremities. When you are anxious, your body goes into a fight-or-flight response, which can cause your heart rate to increase and blood vessels to constrict, potentially leading to the numbness you are feeling.

Another possibility is that you may be experiencing a form of positional or situational syncope, which is a temporary loss of consciousness due to a drop in blood flow to the brain. This can be triggered by prolonged sitting, especially in a confined space like a bus or car, and can lead to symptoms such as dizziness, nausea, and cold sweats. The fact that you feel particularly fatigued and weak after these episodes could indicate that your body is reacting to a sudden change in blood pressure or blood flow.

Peripheral neuropathy is another condition that could explain your symptoms. This condition involves damage to the peripheral nerves and can lead to numbness, tingling, and weakness in the limbs. It can be caused by various factors, including diabetes, vitamin deficiencies, or exposure to toxins. If you have any underlying health conditions, such as diabetes or thyroid issues, it would be wise to discuss these with your healthcare provider.

Additionally, your symptoms could be related to a cardiovascular issue. Conditions such as orthostatic hypotension, where blood pressure drops significantly when standing up or sitting for long periods, can cause dizziness, faintness, and cold sweats. If you notice that these symptoms worsen when you change positions, this could be a factor to consider.

Given the complexity of your symptoms, it is crucial to consult with a healthcare professional who can perform a thorough evaluation. This may include blood tests to check for vitamin deficiencies, blood sugar levels, and thyroid function, as well as a neurological examination to assess your nerve function. Depending on the findings, further tests such as an MRI or nerve conduction studies may be warranted.

In the meantime, consider keeping a symptom diary to track when these episodes occur, their duration, and any potential triggers. This information can be invaluable for your healthcare provider in determining the underlying cause of your symptoms.

Lastly, if anxiety is a significant factor in your life, seeking support from a mental health professional may also be beneficial. Techniques such as cognitive-behavioral therapy (CBT) can help manage anxiety and its physical manifestations.

In summary, while your symptoms can be alarming, they may stem from a variety of causes, ranging from anxiety to potential neurological or cardiovascular issues. A thorough evaluation by a healthcare professional is essential to determine the appropriate diagnosis and treatment plan.

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