This is probably so common not even funny but i just didnt feel like searching and searching for it. Anyway, my problem is when creating an arm, for example, i just make two bones, obviously. When i bend the forearm, though, it makes what i call the “Straw Effect”, what happens when you bend a straw in half. It flattens at the pivot point. I was wondering how the flip to fix this. Thanks! Ps. i dont know if this is the right forum to post in. If im wrong direct me to where i can go.
I found 2 different techniques for fixing the straw effect on a website. Here are the 2 tutorials.
- Use IPO driven shape keys
http://kokcito.tk/rvk/ipo.html
or
- Bones and constraints
http://kokcito.tk/tut/rig2.html
They are both kinda advanced and i have not had time to try them yet but the tutorials have pictures and seem easy enough to follow. I hope it helps 
Or just make sure you have enough edge-rings on the mesh where it bends.
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Before you create more geometry and move to more advanced rigging, be sure to check your vertex group assignments and weight-painting. It sounds like you haven’t done any basic weight-painting.