Where Does The Anger Go?

I realize that I have a lot of stress and frustration and anger built up inside if me. It comes out when I feel out of control. Anger boils to the surface and explodes like the air bubbles do in boiling water. I immediately feel regret after each explosion. I've learned this past year that exercise helps release pressure in a healthy way. I also have realized that I need not be in control of everything in my life. Control or lack thereof does not bring happiness. Contentment does. I need to explore contentment more. I need to keep exercising. I need to breathe. I need to release.