Type 1 diabetes is caused by the immune system destroying the cells in the pancreas that make insulin. This causes diabetes by leaving the body without enough insulin to function normally.
Type 2 diabetes causes are usually multifactorial - more than one diabetes cause is involved. Often, the most overwhelming factor is a family history of type 2 diabetes.
This is the most likely type 2 diabetes cause.
There are a variety of risk factors for type 2 diabetes, any or all of which increase the chances of developing the condition.
These include:
Obesity
Living a sedentary lifestyle
Increasing age
Bad diet
Other type 2 diabetes causes such as pregnancy