I don't really have any. However, I know that genes, medications and even mental disorders can cause obesity.
Sure friend,Obesity caused due to genes, medications. Due to what you became fat.
I have a high body weight, and am considered obese. I really struggle with finding motivation to exercise. Have you ever measured your Body mass index  (by dividing your weight by the square of your height) to see if you are really obese ? I have. Do you have any ideas that might help me with motivation?
A few cases are caused primarily by genes, endocrine disorders, medications, or mental disorder.