Never bottle things up!
Your mind is like a shaken up coke bottle. Literally.
If you don't relieve the pressure and let the stress build up in your subconscious, it will eventually seep into your conscious.
Right when you're at a point in life where everything seems to be going well that's when you will explode resulting in total self destruction.
Talk Talk Talk.
Tackling and expressing your feelings because otherwise unresolved issues manifest like a plague and a tiny little problem can open up a portal of unresolved unexpressed anger.