Blemishes And Acne On Back And Hips. Improvement From Benzoyl Peroxide And Propysalic Ointment. Continuing These Advised?

Hi I am 27 male, suffering from back acne. I got acne on my back and hips... Now less acne more blemishes are left. I am depressed as I am getting married soon and feel shy about my body. I look attractive and got a good physique but these acne marks on my back and hips are hitting my confidence. I want to share few observations that I have seen. Recently I joined swimming classes and I see less acne on my back... After my classes I come home and take shower, I use benzoyl peroxide (perobar 5%) soap to wash my back and hips n latter on apply propysalic nf6 ointment before going to sleep and in the morning( 2 times in a day ). I apply the same on my feet, ankles and knees and back part of the neck... And I amazed to see the results in a short time, acne marks are removing and dark parts of my body are getting fairer... I want to know should i continue using the same treatment, as it is suiting my skin type. Kindly give your expert opinion, is it harmful? It's been going on for a while I mean I discontinue it after sum time and then again start it for over a period of 1 - 1.5 months.