It often begins with something that seems harmless, a small wound near the ankle or a sore on the foot that refuses to heal. Days become weeks. The dressing changes, the ointments change, but the wound remains. Sometimes it even grows larger. https://www.tumblr.com/woundheal/825196846106427392/venous-ulcers-vs-arterial-ulcers-how-to-tell-the?source=share