I am worried about my facial fat graft recovery. Will a soft bump on the cheek kill my fat after 9 days from the surgery date?

It is unlikely that a bump will kill your fat.  Lack of blood supply and circulation to the area as with compression, can kill it.  It is hard to predict at this point which fat will stay and which will get absorbed.  It may take 3 months for everything to heal and for you to appreciate the final results of your procedure.

The best thing to do is wait it out.  There is nothing you can do to reverse the bump.  The fat is now trying to establish a blood supply and time will tell how successful it will be.  In general the face is very forgiving with "bumps" because it has such a good blood supply. 

There is nothing you can do at this point, just leave the area alone unless you see a large bruise.  If there is significant swelling, an NSAID is good to help bring this down.  Otherwise you have to wait and see what happens.  Best, Dr. Emer.

Thanks for writing,Presently your best option is to allow the tissues to heal, swelling to improve and the fat to incorporate. I would follow your plastic surgeons post operative instructions closely and if you are not sure give him / her a call. I am certain they will be happy to help you. The face is very resilient, I am sure you will do well.Stephen M. Davis, MD, FACSGreen Hills Plastic Surgery

I highly doubt you have done damage to the implanted area, given your description. It is normal to experience lumps and bumps early on in the healing process.  Be patient, and you will see the final outcome after 3 months.Much success in your progress!Dr. Windell Davis Boutte'