 It is not easy for doctors to be able to say for definite what kind of diabetes a person has, particularly in young adults, where the distinction between the types is less clear. Because of this, sometimes in about 10 of cases people are given the wrong diagnosis. This can have a huge impact as it means they could be on the wrong treatment from the start, so they cannot control their blood sugars properly, which can lead to increased problems with their health and poor quality of life. 