The most common symptom of TOS is pain and tingling in the arm, shoulder, and hands. Other symptoms may include:• swelling or puffiness in the arm or hand
• bluish discoloration of the hand
• the presence of a lump above the clavicle
• pain in the neck and shoulder which increases at night
• easily fatigued arms and hands
• superficial vein distention in the hand
• weakness of grip or loss of sensation in arm, hand or fingers
• difficulty moving shoulder, arm, hand, or fingers due to numbness and weakness
