Paget-Schrötter syndrome is a type of deep vein thrombosis (DVT) that involves blood clots forming in the arms. These clots usually form in two specific veins, known as your axillary and subclavian veins. It is important to treat the blood clots, as they can break free and move from your arm to other locations in your body, possibly causing life-threatening issues, such as a pulmonary embolism. The disease is more common in younger males. Symptoms Pain Warmth Redness/blueness of the skin Swelling in your arms Treatment Treatment is the same as deep vein thrombosis (DVT) treatment. Anticoagulation medications are a common approach, followed by surgery, when necessary, to clear the blockage.