Caused by excessively indulging in pleasure, if figurative; if literal, it can be confirmed by a physician; either are warnings
[1]As a disease caused by a lack of insulin in the body or insulin resistance, diabetes may represent your inability to process and absorb the sweetness of ife. It may indicate that you have failed to see or express joy. Diabetes in a dream may also come as a warning sign of the onset of diabetes in real life and, like any other disease that may appear in a dream, should be taken a$ a serious message to seek medical advice.
[2]