Anger.

How does it feel when you have nothing to do and you're in the middle of a problem that's bothering you a lot?

Don't you feel that there's no way out? Don't you feel your blood going cold, your veins going darker or your face going paler?

Don't you go around raging that you wanna get rid of this anger?

Why get so furious when the solution is always around you, it's always within you.

I've seen girls cry out all night after gathering like a dozen of anger within them. It ain't funny, it's the perfect way to get out of this anger. Guys have a habit of keeping it within them, but sometimes they just burst  out as well, in fact they're humans too. 

Anger is a slow poison that when kept within kills the person slowly and steadily. It can be stopped. Don't keep too much within you, just speak up. Don't fear over power you. 

Anger is a feeling that has now way too many sources than it did. 

Keep smiling. Anger is just another thunder accompanied by rain. :)