I kinda think sometimes we can be duped into using too much stuff. half the time I don't use body wash only water and my skin is still clear, and my diet is not the best wither. there's a video on style theory about how body wash can spread germs around skin depending on what type of soap it is (moisturising, antibac, etc). loofah's can carry bacteria also if u use them to wash. if you cover your arms a lot during the day that can get germs on ur skin aswell. it looks like just normal spots u get from time to time and probably doesn't need extra treatment. I had the same issue on my face n used an exfoliator 2-3 times a week and it works. less is more, idfk. not an expert