Diabetes comes in many shades, but basically it's the bodies inability to either produce or use insulin effectively so as to maintain a controlled level of blood/glucose and give energy to the body's living cells.
When things don't go as planned and blood/glucose levels rise uncontrollable it can be the result of many things, ranging from a simple hormone imbalance to failure of the pancreas (the organ that produces and controls Insulin production)
Diabetes is usually classified as Type 1 or as Type 2, but there are a great number of other types notably Gestational diabetes and LADA types.
There has traditionally been a medical reason for each type and appropriate medications are prescribed according to each type (some Type 2 control their diabetes by diet alone) and in some instances an individual may be classified as having more than one type of diabetes, such as would be the classification of diabetes type 1.5 (commonly referred to as double diabetes). There is even a type of diabetes known as 'Brittle Diabetes' and also a Type 3 (Brain related diabetes) .In fact there are dozens of types of diabetes classifications other than the popular Type 1 and Type 2.
There are even a number of very specific types of diabetes that aren't common here in the UK as would be the case of 'Tropical Diabetes'
Your doctor should be able to confirm what specific type of diabetes you have. A simple blood test can confirm if you have a specific anti-bodys present within you blood which would resolve the issue as to whether you are actually a Type 1 or Type 2 diabetic (many Type 2's need supplements of Insulin by injection if their diabetes is proving difficult to control by the usual medications) and technically they are classified then as Type 1B diabetes.
It's always nice to know what type of diabetes you actually have as this will help in making decisions in the future as to how best to control and master it.
Hope this answers your question, please feel free to ask if you need further advice - Good Luck