Can you tell me how an obese person get deep vein thrombosis?

VTE and Obesity: Obesity is a moderate patient-specific independent risk factor for DVT. This is due to 2 causes: 1) an obese person has elements of venous insufficiency and a greater risk of venous stasis or pooling of venous blood, 2) morbid obesity is associated with a chronic systemic inflammatory syndrome with evidence of elevated markers of coagulation activation, such as D-dimer.