Hi there, people hold weight in different places,you will notice some people hold weight on there stomach some thighs and bottom some arms and some back etc etc, this can be down to a number of things such as hormones, genetics and types of food consumed, so basically everyone is different. You may notice if your trying to be healthier or your trying to lose weight that you are losing it from other areas, maybe seeing a difference in you stomach first. The stubborn fat may be one of the last places you will lose from, in my case I lose weight of my stomach and torso first and the stubborn fat that comes off last (that I'd put on first) is on my bottom and top thighs. Keep working hard at your healthy diet and high intensity exercise and it will eventually go. Otherwise I'd suggest googling exercises for the higher or lower back (where ever you hold it) and trying some of them to tone the area which will improve the appearance.
Hope this helps