When 10-year-old Claudia was diagnosed with Type 1 diabetes three years ago she had to have four injections of insulin a day.
She found it really upsetting, and used to cry before every injection. Now she has an insulin pump, which means she doesn't need injections any more.
But she says it's not easy enough for children to get insulin pumps.
So she's been to 10 Downing Street to ask for the Prime Minister's help. Watch her story here!