Quoting ashleynb1991:" I have a 1 year old son....just turned 1 on the 9th of September. I feel like I am going to lose my mind ... [snip!] ... dealing with this. It's also ruining my relationship with my fiance because he has no more patience left. I need HELP fast "
When he starts to have them, redirect him. Sing a song really loud to him, whisper a story to him in his ear, start playing with his favorite toy, read a book. Make sure he doesnt have anything nearby that he can hurt himself with, or put him in his crib/play pen so he can have a "time out" to get the anger/frustration out and calm himself down. Also, look into baby sign language to help understand what he is wanting.
I have a one year old who has a temper as well. Usually he does it when he wants something he can not have. It is just frustrating for them because they are gaining their independence and can not say what they are feeling, thus taking it out on themselves.