Published on: 4/7/2025
Numbness in the left chest can be caused by issues with nerves or a vitamin B12 deficiency, as well as other conditions affecting nerve signals.
There are a few reasons why someone might feel numbness in the left chest. One possibility is that nerves are not working as they should. For example, if nerves in your neck or upper back are getting pinched (which some doctors call cervical angina), it may cause numbness or strange feelings in the chest even though the problem starts higher up. Another possibility is a vitamin B12 deficiency, which can harm nerves and cause numbness in various parts of the body. Sometimes, problems that cause numbness in the left arm can also cause similar feelings in the chest. Other causes might include injury to the area or issues with blood flow. It is important to talk with a doctor to find out the exact cause and to get the right tests done, so you can receive the best care.
(References)
Badar A. Neuropsychiatric Disorders Associated With Vitamin B12 Deficiency: An Autobiographical Case Report. Cureus. 2022 Jan 21;14(1):e21476. doi: 10.7759/cureus.21476. PMID: 35223256; PMCID: PMC8858590.
Harada T, Nakai M. Cervical Angina as a Cause of Non-Cardiac Chest Pain: A Case Report. Cureus. 2023 Mar 17;15(3):e36279. doi: 10.7759/cureus.36279. PMID: 37065290; PMCID: PMC10103829.
Shugan A. A Case Study on Differential Diagnosis of Episodic Left Arm Numbness. Neurodiagn J. 2021 Dec;61(4):196-202. doi: 10.1080/21646821.2021.1993699. Epub 2021 Nov 15. PMID: 34780702.
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