what helps back acne?

Hey girls so i know this is off topic but i figured maybe you guys can give me a hand? So i’ve suffered from back acne for the longest and i still can not find a cure for it, i went to a dermatologist and the pills helped a bit but they’re expensive and i constantly have to be taking them or else the acne will come back 😥 my whole back is full of them and its kind of embarrassing because i can’t wear shirts that reveal my back because of it. does anyone know what could help my acne and the discoloration on my back? 😥😥😥