Why are we fighting over small and stupid things?

I think we fight over small things because it's hard for us to show and tell someone how we actually feel and what's really bugging us. So we take our bottled up emotions and express it through small trivial things.

Maybe because they are symbolic of a bigger issue to you. Maybe you feel like you don't have enough control in life (could be due to someone somewhere else - like your boss at work) and you feel like you want to exert your power at home, to feel at least somewhat in control of something.

When you learn someone, you see their bright sides, and then, the more you are with that person, the more you see little flaws. Those flaws are like surprises, so this is why you will tend to overreact to those things. I think if you are arguing on small and stupid things, it's better than arguing on BIG things hehe.

There are many reason the little stuff could be getting to you. You could just be feeling stressed or there is a big issue in the relationship that you're avoiding so use little things as an outlet

There's some inner conflict between you and said person. You two need to sit down and talk things out.

Little things usually are signs of bigger problems. They are small signals of a problematic areas that we need to work on. Usually we get these subtle indicators from the Universe and if ignored, then they either start building up or growing in size. For better or worse, we usually only focus on something if it is deeply disturbing us. Therefore the signs grow in size until we notice them, often starting off as little things. And sooner or later we shall look at them and at what they are actually trying to tell us.

Because we don't see the world in perspective and don't (want to) see the larger picture. We are confined by our own mind, and the confines gets smaller and smaller every time we miss on the larger picture, which happens pretty often. My thought? Expand the horizons of thinking, because the world is a big place, and life is too short to worry about small things.

Because we, as humans, basically live for doing so. It's unfortunate and I hope that as a race we can find a way to change this.

People can get really distressed with life sometimes, routine and general issues we face day to day can get the better of some people, the best thing to do it to take a step back and consider what they are going through, everyone has their own issues, you can talk to them and tell them how you feel and that you're tired of fighting over small things, tell them that you're there and willing to help with whatever issues they might have, but most of all, give them space, and don't be invasive, they might just need some time to themselves :D

Because that's the way we vent over something. It can be anything like not being answered to on the phone, or something else. Then we go all guns blazin' over something not worth the time. It's just about a bit of realization, that we are losing control, and take a few minutes off... sip a mojito or something and come back fresh to reduce such mishaps by a major degree.