The reason is that fat cells are insulin resistant and when a person, child or adult, has an excessive number of fat cells, insulin doesn't do its job as well to lower glucose levels. Diabetes
can be the result. Type 2 diabetes in
children is not common, but your family member does ask a good question, considering the thirst and frequent urination. If I were this child's parent, I believe that I would ask his doctor to check his sugar levels just to be safe.