Heat Sensation in the Outer Side of the Right Pinky Finger

Heat sensation on the outer side of the right palm (near the upper side of the little finger)?

Hello Dr.
Jiang,
During the Qingming holiday, I suddenly noticed that the outer side of my right little finger near the top felt warm while I was cooking.
It only lasted for a short time, and since it didn't happen again for a few days, I didn't pay much attention to it.
However, this past Monday around noon, it occurred again, lasting only briefly.
Then on Tuesday, it happened about 2 to 4 times, from morning until noon.
On Wednesday morning around 8 AM, it started feeling warm again, but this time the duration was longer.
I was diagnosed with a herniated disc last May, and I'm wondering if this is related.
Additionally, I have a habit of using my right little finger to clean my ears; could this be a contributing factor? Thank you for your help.

Ms. Li, 30~39 year old female. Ask Date: 2024/04/10

Dr. Jiang Junyi reply Neurology

Dear Ms.
Lee,
You mentioned that "the outer side of your right little finger is feeling warm near the top..." This is a symptom of peripheral nerve compression.
1.
The nature of the pain is characterized by burning and tingling sensations.
2.
The symptoms have a specific band-like distribution, and touching or pressing can provoke the symptoms.
3.
Accompanied by muscle weakness and fatigue, it may be necessary to consider ulnar nerve inflammation or injury.
Symptoms from injury to the first thoracic nerve root typically present as sensations radiating down from the back, especially when looking down.
Numbness in the ulnar nerve distribution (which affects part of the little finger and half of the ring finger, as well as the palm below) is common.
The numbness often worsens at night, and pain in the same area is also frequently observed, sometimes accompanied by a burning sensation.

Examinations for peripheral nerve issues can typically utilize electrophysiological tests to assist in diagnosis.
Nerve conduction studies assess the conduction velocity and waveform of large fiber nerves.
Electromyography evaluates the muscle response in the nerve distribution area.
I recommend increasing your intake of B vitamins and reminding yourself to perform stretching exercises every half hour to avoid exacerbating symptoms due to nerve compression and muscle tightness.
If symptoms persist, I suggest visiting a neurology clinic for further evaluation, specifically consulting a physician with expertise in peripheral nerves, as they have more experience with electromyography testing.
Thank you for your inquiry, and feel free to discuss further.
Wishing you good health, peace, and happiness.
Sincerely,
Dr.
Jiang Junyi
Your caring physician

Reply Date: 2024/04/10

More Info

The sensation of heat in the outer side of the right pinky finger can be indicative of several underlying issues, particularly related to nerve function and potential compression. Given your history of a herniated disc diagnosed last year, it is plausible that this condition could be contributing to your symptoms. Herniated discs can lead to nerve root compression, which may manifest as abnormal sensations, including warmth, tingling, or pain in the extremities.

The specific area you are describing—the outer side of the pinky finger—is primarily innervated by the ulnar nerve. This nerve runs from the neck down into the arm and hand, and it can be affected by various factors, including cervical spine issues, repetitive movements, or even localized trauma. If you frequently use your pinky finger for activities like ear cleaning, it could potentially lead to irritation or inflammation of the ulnar nerve, especially if the movements are repetitive or forceful.

The symptoms you describe—intermittent warmth that has increased in duration—could suggest a few possibilities:
1. Ulnar Nerve Compression: This can occur at various points along the nerve's pathway, including the elbow (cubital tunnel syndrome) or the wrist (Guyon's canal syndrome). Compression can lead to sensations of heat, tingling, or numbness in the areas supplied by the nerve.

2. Peripheral Neuropathy: This condition involves damage to the peripheral nerves and can result from various causes, including diabetes, vitamin deficiencies, or exposure to toxins. While your symptoms seem localized, peripheral neuropathy could still be a consideration.

3. Cervical Radiculopathy: Given your history of a herniated disc, it's possible that the disc could be irritating a nerve root in the cervical spine, leading to referred sensations in the hand.

4. Local Inflammation or Injury: If you have engaged in activities that put stress on your hand or wrist, localized inflammation could also cause abnormal sensations.

To further investigate these symptoms, it would be advisable to consult with a neurologist or an orthopedic specialist who can perform a thorough examination. They may recommend diagnostic tests such as nerve conduction studies or electromyography (EMG) to assess the function of the ulnar nerve and determine if there is any compression or damage.

In the meantime, you can take some preventive measures to alleviate symptoms. Consider avoiding repetitive motions that may aggravate the nerve, and incorporate regular stretching exercises for your hands and wrists. Additionally, ensuring adequate vitamin B intake can support nerve health, as deficiencies in these vitamins can contribute to neuropathic symptoms.

If your symptoms persist or worsen, or if you experience additional symptoms such as weakness or significant pain, it is crucial to seek medical attention promptly. Early intervention can help prevent further complications and improve your overall quality of life.

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