Numb across left breast

Numbness in your chest can arrive suddenly and bring about a tingling sensation or the feeling of pins and needles. This sensation can be caused by a number of conditions. Other potential causes, although less serious, still warrant a visit to your doctor. Numbness in the chest is usually not caused by issues in the brain or spinal cord. Numbness and tingling can also be brought on by other health conditions that impact the nervous system.

Thoracic outlet syndrome TOS is a syndrome that can cause any combination of pain, weakness, numbness, tingling, sensation of coldness or, sometimes, a more general feeling of discomfort in portions of the upper body. The area above and behind the clavicle collarbone from the neck to the shoulder forms an "outlet" through which blood vessels and nerves pass before they enter the arms to supply them with circulation blood and oxygen and sensation pain and feeling. The underlying cause of the compression itself can vary. It may be the result of an extra rib known as a cervical rib , hypertrophic enlarged muscle or scar tissue, or abnormality of muscles in the neck. It can also occur from a narrowing of the thoracic outlet space between the clavicle and chest wall or in the region where the nerves and blood vessels pass under muscles as they cross the shoulder. Hypermobility looseness of the either of the scapula shoulder blade or the glenohumeral joint of the shoulder can also create tension or traction on the nerves or blood vessels in the thoracic outlet region. Body position such as poor posture or certain overhead activities can also play a role in causing or contributing to symptoms.

Just as with breast cancer, detecting lymphedema early increases the likelihood of successful treatment. Early detection can be challenging, though, because first symptoms are often subtle. They may feel tingling or numbing in their arm for a day or two, but it goes away. Then it happens again and goes away.

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