CONGESTION Causes Systemic: general or pulmonary Cardiac dysfunction(right or left Local: local venous compression or obstruction External compression -- Tumor, bandage Occlusion of lumen -- Thrombosis Embolism Thickening of venous wall Paralysis of neurogenic modulation--- Burn frostbiteCauses: Systemic: general or pulmonary Cardiac dysfunction (right or left) Local: local venous compression or obstruction External Compression --- Tumor, Bandage Occlusion of lumen --- Thrombosis, Embolism Thickening of venous wall Paralysis of neurogenic modulation --- Burn, frostbite CONGESTION