Fluffing is not really a medical term, just something all us ladies have made up as usually if you ask a surgeon they haven’t got a clue what you’re on about lol. It is when the muscle relaxes stretches and loosens, it stops squashing and compressing the implant so much so your breasts become a little bigger. There is no set time for it to happen, you may experience some at 5 or 6 weeks, but it is likely to continue several months down the line. You will probably notice further increases at around 7 months, although as with everything, it does vary from person to person.