A few disadvantages of using a insulin pump is that it is very expensive, the most you can disconnect your pump is for an hour (For when you want to take a shower), they do not think for you which means you have to check your blood glucose at least 4 times a day which can often be a lot of work, it can also cause weight gain and the risk of skin infections or absorption problems. Letting others know that you have diabetes is also something that most people will not prefer.