Pimple on breast

Patient: Hello doctor.i am 21 year old girl.i have got a small skin coloured pimple on my breast few days back.not on nipples but above it.i pressed it and pus has come out.but later it turned into a red coloured pimple and i am getting some irritation also.whenever i scratch it a little,the redness is spreading around the pimple.please advice

Doctor: