What is diabetes? Dr Hector Perera London Diabetes is a serious life-long health condition that occurs when the amount of glucose (sugar) in the blood is too high because the body can’t use it properly. If left untreated, high blood glucose levels can cause serious health complications. There are two main types of diabetes: Type 1 and Type 2. They’re different conditions, caused by different things, but they are both serious and need to be treated and managed properly. There are two types of diabetes, type 1 and type 2 Type 1 diabetes is a lifelong, autoimmune condition. Type 1 diabetes can affect anyone, at any age. It isn’t caused by poor diet or an unhealthy lifestyle. In fact, it isn’t caused by anything that you did or didn’t do. There was nothing you could have done to prevent it. In Type 2 diabetes, the body doesn’t make enough insulin, ...