It sounds like the familiar "holding your breath" method. We've all tried it and the pressure just builds until we eventually explode (or act out

). Then the pressure gets released for a time... until the next time.
Have you read the handbook? Do you have anyone to speak to about it?
We need to learn to live differently and release the pressure in a healthy way before we are "forced" to act out.
Take a look at the handbook. Try some ideas. See if it works for you. I highly recommend discussing it with someone you trust. It is hard to "fight" it, especially when it is a secret. Sharing it, helps us "let go" of it. Which is far more effective.