Hello 4428247: I'm sorry I don't think I really have an answer for you. But I saw no one had replied to your post. So I thought I would. You know, I have permanent physical problems related to my own prior self-harm. Once I realized what I had done to myself I did finally stop. But by then it was too late.

I cannot help you with the bandage idea. But, based on my own personal experience, I would have to say that the wise course of action here would be to seek medical treatment for whatever it is you have done to yourself & mental health treatment for whatever it is that is driving you to do it. I wish you well...