After weight loss surgery, you can expect to lose weight. It differs for everyone, but for most people the first year is when you can expect the fastest of that weight loss. It is a very special time! However, it can be both exciting and frustrating when you are losing weight so fast. Your body is changing so fast that your clothes are going to start falling off you. Yes, this is incredible, but at the same time it can be very stressful when you know you must keep buying new clothes.