I have black areas / marks on my legs that are also red and inflamed on edges. painful and legs and ankles are swollen?

Venous insufficiency: Early complaints with CVI (chronic venous insufficiency) is swelling in the leg/feet. As the disease progresses, patients of the CVI start complaining of mild pain/fatigue in legs. Later on, appear black spots on the skin of legs and feet, which slowly keep on increasing in size and depth. As the days advance, the same very black spots give rise to ulcers. You should see a vascular surgeon ASAP.