Your left arm might feel cold inside due to a few potential reasons, and one of them could be related to a condition called arterial thoracic outlet syndrome (TOS).
Arterial Thoracic Outlet Syndrome
What is Arterial TOS?
Arterial TOS is a condition where the subclavian artery, the main artery that supplies blood to your arm, gets compressed. This compression happens in the thoracic outlet, a space between your collarbone and your first rib. When this artery is squeezed or impinged, it can restrict blood flow to your arm, which can cause a feeling of coldness.
How Does it Cause Coldness?
Reduced blood flow means that less warm blood is reaching your arm. This can lead to a noticeable cold sensation, especially deep within the arm. This sensation can occur:
- In the entire arm
- Only in certain parts of the arm or hand
- With associated pain or discomfort
Other Symptoms of Arterial TOS
Besides feeling cold, you might also experience:
- Pain in the arm, neck, and shoulder
- Numbness or tingling in the fingers and hands
- Weakness in the arm or hand
- A pale or bluish color in the hand
- Lack of pulse in the arm
Seeking Medical Advice
It is important to note that other reasons could be causing your cold arm. Always consult a healthcare professional for an accurate diagnosis and appropriate treatment plan.
| Symptom | Possible Reason |
|---|---|
| Cold Arm | Reduced blood flow due to arterial TOS |
| Arm Pain | Possible impingement of artery or nerves |
| Numbness | Possible nerve compression |
| Weakness | Poor blood flow or nerve compression |
While Arterial TOS could be a reason for your left arm feeling cold, a full medical evaluation is crucial to determine the exact cause and rule out other conditions. It’s important to see a doctor for a proper diagnosis and treatment if you are experiencing this symptom.
