Maybe there are also a very few as yet undiagnosed diseases causing obesity. You bet your life it does. At least 20 serious medical conditions are caused by obesity. The most important are bad knees, diabetes, high blood pressure, increased blood cholesterol, and hardening of the arteries. Up to three times one's weight is transmitted through each knee and so any extra weight wears down the cartilage cushion in the knee extra quickly.
Obesity can lead to a wheelchair existence or to an expensive knee replacement.
Minor assistance may be provided by appetite suppressing drugs and drinking a tall glass of water 10-15 minutes before each meal. The most important aspect of your diet is quantity. You have to eat 500 calories less per day to lose a pound per week. Cut out fats, decrease butter, and trim off all fat. In a few cases, liquid diets can even be dangerous.