That is a big name that is named after a small space between the collarbone (clavicle) and the first rib (see picture).
Thoracic outlet syndrome (TOS) is a group of disorders that involve 1. compression, 2. injury, or 3. irritation of your nerves, blood vessels, or veins in your thoracic outlet.
This syndrome can cause pain in your neck, shoulders, go into the arms and cause numbness in your fingers.
The cause of the compression can vary and may include:
• Anatomical defects: Inherited defects present at birth, including a (neck) rib—an extra rib located above the first rib—or an abnormally tight fibrous band connecting your spine to your rib.
• Poor posture: Drooping your shoulders or holding your head in a forward position can cause compression in your thoracic outlet area. Like using a computer.
• Trauma: A traumatic event, such as a minor car accident, can cause internal changes that then ‘compress your nerves’ in the thoracic outlet.
• Repetitive activity: Doing the same activity over and over can wear on your body’s tissues. You may notice symptoms of thoracic outlet syndrome, if your job requires continuous repetition of a movement, such as typing on a computer for extended periods, working on an assembly line, or stocking shelves and repeatedly lifting things above your head. Another cause is the carrying of heavy shoulder bags or briefcases.
Let us know if you experience any of the symptoms listed below (and if you know someone with these symptoms please share this handout with them):
What Are the Symptoms of TOS?
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Numbness or tingling in your neck, shoulder, arm, or fingers
• A minor ache in your arm or hand
• Weakening grip
• Difficulty with fine-motor tasks - Bluish discoloration of your hand
• Swelling or puffiness in your arm or hand
• Coldness of your hands or fingers
• Throbbing lump near your collarbone (clavicle)
• Deep pain in your neck and shoulder region that may increase at night
• Easily fatigued arms and hands