Phlegmasia alba dolens, also called as “milk leg”, is an extensive thrombosis of the ileofemoral veins leading to complete obstruction of the venous flow in sep veins. This is an acute process and usually occurs after child birth because of the compression of the left iliac vein by the enlarged uterus. This process is associated with excruciating pain, swelling, ulceration, and development of wet gangrene. It is also referred to as “milk leg” because of the whitish discoloration secondary to venous outflow obstruction. If urgent treatment in not given, superficial venous system will also get involved and and lead to Phlegmasia cerulea dolens, which can be limb and/or life threatening.