it says clotting but my doctor when he intially saw that my arm was blue and swollen he ran some type of blood test which came back negative so is it possible i just have the symptoms because of compression? i hate the medical system here in canada its been since august 30 of this year that this accident at work happened and my arm has been blue since and my scapulla has been very sore . to all the others here on this site i feel for you guys