When can I drink coffee again? And for how long do I have to keep eating foods with no salt or no sodium?

I have never asked any patient to avoid coffee after surgery.  Not sure what the concern would be.  Low salt diet is to help you not become swollen and retain fluids.  In my practice, any restrictions for diet or medications is two weeks before and two weeks after.  

I do a LOT of tummy tucks in my practice and while I suggest to patients that they monitor their salt intake postoperatively, I don't see any reason to avoid coffee.The concern must be about the caffeine content of coffee causing blood vessels to constrict and perhaps delaying wound healing.  At least, that is what I would guess.  As far as I know, there is no evidence that a cup of coffee is going to cause such a problem.Also, as far as sodium, it is clear that a very high dose of salt (e.g. Chinese food) will probably make you swell and become uncomfortable.  Swelling after this type of meal seems to go on for a couple of days.Basically, in my practice, most dietary habits IN MODERATION are probably fine.

There should be no dietary restrictions after an abdominoplasty.  A healthy diet  and establishing a healthy life style are most important.