Background: Post thrombotic syndrome an important chronic consequence of deep vein thrombosis. Severe post thrombotic syndrome including venous ulcer, which develop in 5% to 10 %, the principal risk factors of post thrombotic syndrome are anatomically extensive DVT, recurrent ipsilateral DVT. Recurrent DVT that may occur years later after the initial event is a known risk factor for the development of PTS. 1 (super script done)Post thrombosis of big vein in abdomen (vena cava) or pelvic (iliac vein) leads to development of collaterals in anterior abdominal wall. Case report: A 28 year male chronic smoker known case of DVT presented with non healing venous ulcer with dilated anterior abdominal wall and left leg vein. On evaluation, he was diagnosed with anterior abdominal wall varicose vein in post thrombotic syndrome post DVT with secondary varicose vein and venous ulcer in left leg for which anticoagulant was prescribed with advice of stenting. Discussion: Post thrombotic syndrome of the legs, characterized by chronic venous insufficiency, occurs in up to half of patients who experience DVT or Pulmonary embolism. After DVT, Post thrombotic syndrome will develop in 20% to 50% of patient and post thrombotic syndrome complication are stasis ulcer, skin changes and varicose vein of leg commonly. Post DVT of major vessel of leg, resulting varicosity of the veins of abdominal wall which is a rare complication. Large, prominent normal veins are seen often in the abdominal wal1, particularity in thin individual is and in conjunction with prominent veins elsewhere in the body.