Why do I get mad so fast? What's wrong with me?

I'm always sad all the time, or I'm mad all the time. I feel like my anger takes over me. I'm a pretty good person when it comes to morals, and etc. But when I get angry I get ANGRY. It's been a couple weeks since my sister took my ipod ( even though she has an iphone ) and I wanted to go for a morning run because it helps keep my mood up for the day. I realized she took my ipod. She said she was going to borrow it but she never gave it back. She tends to take my things for a lot of reasons. I always tell her nicely to not do stuff like this but she does it all the time. Anyways on with my story I have an extra ipod but it wasn't working something was wrong with it I was suppose to go jogging with my other sister but I kept telling her: "no lets not go yet until I ge tmy music on here" So an hour passed by, and it still ddidn't work. I was so mad I hit my laptop and threw my ipod, out of frustration. Then I told my sister let's go. My sister said no it's too late to go now, cause it gets too hot. I was so mad I went to go brush my teeth as I was brushing my teeth I socked the mirror, and the whole thing was broken, and shattered all over the sink. I didn't care for the moment because I was so mad… I feel like the littlest things tick me off so much… I know I shouldn't have acted in such a way but I couldn't help it I tend to break a lot of things when I'm frustrated… My family call me psychopath, and I'm starting to believe them that I'm one. But I don't know why I act like this before when i was younger i used to always cry the more I got older the more it made me want to just break or hit something. I feel like one day if I get too mad I might beat the *** out of someone…

Google some things that could help. Like "Tips to relax" or "How to deal with my anger issue"

Don't get too mad with me but.P This is definitely in your DNA genetic make up. I don't think this all the time, but in your case I believe it's appropriate, good advice, Have you thought of anger management? Psychiatric therapy?

I think they could give you good advice on how to best tackle this problem, you won't be the only one and there are many many different and worse mental problems than yours. But I would advise that you acknowledge it is a problem/condition; then you will accept you need to seek treatment and help.

gl man