Rare Thoracic Outlet Syndrome Causes Arm and Shoulder Weakness

Injuries and Conditions that Lead to Thoracic Outlet Syndrome (TOS)

Thoracic outlet syndrome (TOS) often develops as a result of poor posture or injury. There are various factors that can contribute to the onset of this condition. For instance, individuals who have experienced physical trauma from car or motorcycle accidents are at a higher risk of developing TOS. Furthermore, whiplash injuries can result in delayed-onset TOS symptoms even after the initial whiplash issues have healed.

Moreover, injuries to the first rib or collarbone can also lead to TOS. Excessive weight gain and obesity can exacerbate the condition as well. These factors cause an increase in fatty tissue in the neck, which puts pressure on the nerves or subclavian vessels and compresses the joints. Additionally, pregnant women who have previously experienced mild TOS may notice an increase in symptoms during pregnancy.

Although rare, certain conditions such as tumors in the neck or enlarged lymph nodes in the upper chest or underarm areas can also result in compression and consequently cause TOS.


Work-Related Triggers of Thoracic Outlet Syndrome

Thoracic outlet syndrome can be triggered by various work-related activities that involve repetitive overhead motions, as well as lifting, carrying, or pulling heavy objects. Such activities can result in inflammation or swelling, which in turn exerts pressure on the nerves and blood vessels. Individuals in professions such as hairdressing, dental hygiene, painting, and auto mechanics are often prone to developing this condition. Similarly, shelf stockers, factory line workers, and individuals who spend their days typing are also at a higher risk. Furthermore, those who frequently adopt awkward or prolonged postures while performing their occupational tasks are susceptible to thoracic outlet syndrome.

2 of 5