Hi, I have an ulcer on the top of my foot that I'm told now has gangrene. I've been seen by the foot clinic and yesterday saw a vascular surgeon who is going to book me in for an angioplasty. But does anyone know what happens in the meantime? No-one has mentioned taking any other action but the angioplasty is at least three weeks away. I'm just putting iodine dressings and plasters on it. My foot has swollen up today. It's terrifying.