According to Dr John Scurr leading Consultant Vascular Surgeon and expert on Deep Vein Thrombosis (DVT), Deep Vein Thrombosis (DVT) and the less serious manifestations of sluggish or disturbed circulation such as swollen ankles, pins and needles, calf cramp etc are far more common than appreciated. Not just confined to air and coach travel, but any situations linked with long periods of immobility. Whilst in the majority of cases, a DVT will resolve itself