Long standing lower extremity venous disease can result in a brown discoloration of the skin on the lower legs. It is caused by iron deposition in the skin. It has the appearance of rust b/c in effect, that is what it is. The high venous pressures that are associated with severe lower extremity venous disease force red blood cells out into the skin. The red blood cells die once outside the circulatory system and they leave their iron behind. Over time, the skin over the lower legs progressively darkens as more and more iron is deposited. The good news is that once we definitively treat the lower extremity venous disease, the skin discoloration fades over time. At Mississippi Vein, we have a specialized cosmetic laser to treat the skin discoloration and significantly speed its resolution.