Hi, I used to get big pimples between my breasts which

Patient: Hi,I used to get big pimples between my breasts which would be sore and would burst with white puss and blood coming out. I used to get this when i was 14-16. I use to live in the UK and it is cold and I am always covered and my bra would only be taken off for showering.I don’t get the pimples anymore but now i have brown and black scars left behind with little bumps on the skin too. How can I get rid of these bumps and scars?

Doctor: