 There are three main forms of diabetes: Type 1 diabetes, Type 2 diabetes and genetic diabetes. The treatment for each is very different because they have different causes. People with Type 1 diabetes stop making their own insulin, so need insulin injections instead, whereas people with Type 2 diabetes can keep making their own insulin but it may not work as well as it should, so they need to watch what they eat, and may also need tablets or eventually insulin injections. Genetic forms of diabetes have specific treatments according to the subgroup. 