The stage of diabetes considered "bad" is Stage 3, where it progresses to type 2 diabetes.
According to provided information:
- In Stage 3, blood sugar levels are abnormally high, leading to a diagnosis of type 2 diabetes. Insulin resistance and beta cell dysfunction are factors that can lead to high blood sugar levels in type 2 diabetes. Without treatment, these elevated levels can cause long-term damage to the body.
In summary, while all stages of diabetes require management, Stage 3 (type 2 diabetes) is particularly concerning due to the risk of long-term complications from high blood sugar if left untreated.