Hi, I had a huge cyst under my armpit which was very painful. I left it alone for weeks until one day I got out the shower, checked it and it had burst on its own. It was leaking yellow puss, I cleaned the area and it bled a lot!! I put a plaster on because it was dripping down my arm the bleeding was that bad, now I have a hole under my arm, it s quite sore, shall I leave it to close naturally?