Can a deep vein thombrosis heal itself without any treatment? and how long does it take to travel in the body?

Most=never detected: and heal without recognition/treatment. No symptoms unless large enough, block enough vein flow or break free & move from origin along with blood up through the right heart & into the lungs (a few seconds) during which many break up. if remain large enough, block enough blood flow in lung arteries then possible pain (quickly fatal if block to both lungs). So many variables: http://goo.gl/Blh6rW.