Hi,
When i was diagnosed in 2009 i was told that it's 'policy' to not recommend to patients to inject in arms, as AMbrennan has said it's because it's very easy to hit muscle causing the insulin to be apsorbed to quickly resulting in hypo's and misleading patterns in readings.
Many people do still inject in arms absolutely fine though, i guess it takes some skill though, i've never tried it but i can imagine it being quite awkward to do and i would probably naff it up good and proper haha.
I also think injecting in the tummy would be quicker and more discreet from any unwanted attention too?
Things change in treatment all the time, sort of like how you put a baby to bed, one year it's best to do this then the next it's wrong and now you do it this way.