What is the ulcer condition called stasis?

Venous stasis ulcer: Venous insufficiency presents with varying stages. Stage1=spider veins, 2=varicose veins, 3=edema, 4a= stasis changes(brownish pigmentation), 4b=skin changes(lipodermatosclerosis, atrophie blanche), 5=healed ulcer, 6= active ulcer. With stage 6, active ulcer is the worst case , and fixing the venous insufficiency will help in healing of the ulcer along with compression, local care.

Venous leg ulcer: A better name for the ulcer condition that you are describing is venous leg ulcer. The term "stasis" is an older term and is actually not really accurate. The cause of the problem is venous hypertension and not stasis. Regardless of what you call it though, the treatment for the ulcer is compression and treating the varicose vein reflux that is causing the venous hypertension.

VSU: An ulcer that is due to vein hypertension in the lower extremity is also called a venous ulcer or venous stasis ulcer. Due to incompetent valves in the veins, blood essentially stays in the lower leg, building up pressure so that a portion of the fluid component (and a little bit of red blood cells) leak out, work their way through the tissues to the outside skin resulting in ulcers and staining.