What is Meant by a Patient's Skin is Too Tight for a High Amount of Fat Injections?

To be honest with you, I always find it funny when patients come in and tell me how much fat they want injected into their buttocks.  "I want 800cc's!"
How do you know how much you want.  How do you know how many cc's of fat you have that can be transferred to your buttocks? How do you know how many cc's of fat your buttocks will hold?  How do you know what 800cc's of fat will look like in your buttocks?  Do you know how much will live out of that 800cc's?  If your buttocks only has room for 600cc's and we force 800cc's in, do you know what that will do?  
I have been performing this procedure for 14 years and have done Hundreds of Brazilian Butt Lifts and I still cannot tell precisely how much fat I can transfer until it's done.  
There are 4 major limitations to how much fat will survive in your buttocks.  1) How much fat you have available in other body parts that you want to have liposuctioned.   If you don't want a particular body part made smaller, then don't have liposuction of that area!  
2) How much fat your buttocks will hold.  Your butt skin will only stretch so far.  The more fat you force in, the more pressure there will be on the blood supply to those fat cells and the more likely it is that they will die!  3) What you do afterwards will play a big role in how much fat will survive.  Follow your doctors instructions to the "T"!!! 
4) The technique used by the surgeon is also extremely important.  If the fat cells are dead when they are injected, or if they die because too much volume is forced in, then no matter how perfect everything else is done.... the fat cells are already dead.
Seek out a surgeon who has experience with this procedure, good results, knows what they are doing.....And Trust Them!!!

Think of your skin like a bag. You can only fit so much into the bag until it gets damaged. The bag might stretch and thin out, or rip. Your skin, and the surrounding tissues, can only take so much before it gets damaged as well. Putting too much fat so that your skin is beyond capacity can lead to serious complications. 

Each surgeon has a protocol that differs from the next.The skin gets tight after fat transfer, adding more fat increases the pressure and stress on the fat cells to stay viable. Keeping the pressure at a minimun is also the reason the avoid sitting after Brazillian...it adds pressure and decreases the "take" of fat transfer. Speak with your plastic surgeon about his/her protocol.