What is inner pain?

If you think it over, this pain is all about strong emotions. And there're not necessarily "bad" emotions, such as: anger, resentment, disappointment, etc. (the list is long). It can also be love, but you have no one to share it with or to express it somehow. Or it can be a very strong love that doesn't have enough space to bloom. What should we do to prevent the "explosion"? After all, a strong emotion, like any explosion, leads to devastation and it takes a long time to rebuild what has been destroyed... What can we do when feelings overwhelm us? Increase your inner space. Let it expand. How? Breathing... Try to breathe through your mouth. When we start breathing through our mouth, we automatically engage our stomach. And it's like we focus our mind on the belly.