Definitely give the Novopen4 a go! I've been using it for a couple of years or so now, and it's brilliant

So easy to use! Much better than FlexPens (disposable pens). I've never used Novopen 3, but from what i've heard, they need more force to inject the insulin.
As for using ice for numbing, this is something i've heard some doctors recommend even. But with your mum's problems with both pain and not being able to pinch and inject at the same time, i'd still suggest she tries the Insuflon. Then she'd be able to use EMLA for the insertion, and would only need to have needles every 3 days or so.
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22 years old, diagnosed T1D on october 14th 2004.
On MDI, Novorapid and Levemir, using the NP4
Currently back to pumping with my IR1200, April 2008.
Been using D-tron and Animas IR1200 but prefer the pen