Sclerotherapy is a clinical treatment that is used to eliminate varicose veins and spider veins. During sclerotherapy, generally, a salt solution is injected directly into your veins. This solution irritates the lining of the blood vessels by causing it to collapse and stick together resulting it blood clot formation. With time these blood vessels turn into scar tissue that fades from the view.
Deep vein thrombosis is a condition when a blood clot forms in the veins in your body. The blood can clot in one or more of the deep veins and cause swelling and pain. Blood clots are referred to as thrombus. Deep vein thrombosis can lead to severe problems as it can block the blood flow in your body and can also lead to pulmonary embolism.