I'm having a hard time losing weight in my arms and back fat. Does anyone have recommendations for certain exercises? I really hate my arms right now and feel like i'm losing everywhere but my arms.

I do internet searches for those exercises. I use 2 lb weights and do circles and things with my arms as I'm walking, follow a lot of the arm exercises as I run on the treadmill as well.

Exercise does not make you lose fat.

If you exercise, you may be able to increase muscle in the targeted area, but it has no impact on the fat being stored in that area.

Just keep losing, eventually your body has to burn the fat, even in the hard places. Just keep going it, comes off. No spot exercising is going to help. Cardio to burn more calories overall will, or just increasing muscle mass to burn more calories

You have to eat a proper diet with protien to increase your muscle mass. If your definitely wanting to target fat loss...look into a the ketosis lifestyle where you switch your body from burning the normal sugar and carbs as fuel and start burning fat...even stubborn fat. It Works!!! Especially when you've hit a plateau.
This link might help you also speak with your Dr or Nut about it.

https://kickincarbclutter.blogspot.com/2017/06/getting-into-ketosis-after-bariatric-surgery.html?m=1

mybariatricjourney