Thoracic Outlet Syndrome involves an area on the front of your neck/chest/shoulder called the thoracic outlet where important structures pass through on the way to your arm such as the nerve, artery, and vein. This passage can become narrowed or restricted due to injury, inflammation, poor posture, or tight muscles. Compression of the nerve, artery, and vein can lead to symptoms such as numbness and tingling in your hand, and a “heavy” or “cold” sensation in your hand or swelling of the hand. Your therapist will do a series of tests to determine the cause of your symptoms and create a treatment plan to address your concerns.