Hi Jezshazz.
You're mum should see her GP if she's having pain when passing urine as this could have nothing to do with her diabetesg. It could be an infection. If she isn't being helped with her diet, as I wasn't, she can ask to see a dietician. People seem to think that only type 1's are entitled to outside help, as I at first did, and battled with my diet on my own, but not the case. Your mum is entitled to see one.