Will a donut cushion be enough to not put pressure on my butt while driving, after BBL?

I do not recommend a donut cushion. It puts all the pressure where the fat was injected.  The opening is usually where no fat was injected.  I find nothing works in a car.  If you have to drive, take short trips of 30mins at a time and minimize driving time as much as possible.Best Regards,Dr Gartner

Hello dear!!
Thanks for the question and provided information as well.
Each doctor has their own protocol It is very important that you talk to him about your concerns and goals. I recommend my patients not to sit for more than 30 mins. every two hours, for the first 2 weeks, and always with the help of a boppy pillow. If you have any concerns, I suggest you to follow up close with your plastic surgeon.
Hope this is helpful. Good luck :) 

A donut is ok to sit on at home, but probably not good for driving long distances. I prefer that patients avoid an extended pressure on the areas for the first few weeks.