Total ducts exctasia surgery - what will happen during the operation and what changes will follow afterwards?

Hello, almost 3 years ago I have started to feel pain in my left breast and my nipple got inverted. Was sent home by GP that it's nothing to worry about. Few months back I was back as I felt a lump and was sent to breast clinic. Had biopsy and was told I have mastitis Infection and was discharged regardless of increasing pain and lump. Year later found another lump and went to different hospital. Had discharge and pain ongoing through all this time.... Was sent home saying I have chronic mastitis. Took antibiotics every single time it gotten worse.now I had one very painful abscess that took me to emergency room and finally was aspirated...and barely month later I have another one even bigger. This one was aspirated last Friday and it's back again. Waiting on biopsy results a d have surgery scheduled late May....what I can expect with such a long Ng story of infection and changes following the operation? 

Kind regards