Can I have a BMI of 20 and get a Brazilian butt lift and will gaining a little bit of weight help with this procedure?

Ideal candidates are at a stable weight,  in good health , and have excess fat in some parts of the body and too little in other regions.  Gaining weight before the procedure is to no advantage and when you lose weight again the fat cells will shrink just like the donor site fat cells.  Typically, the transferred fat results in a significant increase in volume of the body site being treated.

Hello and Great Question.  I appreciate the time you are spending researching this procedure.  My name is Dr. Matthew J. Nykiel.  I am a Board Certified Plastic Surgeon, a Fellowship Trained Cosmetic Surgeon, and a Butt Augmentation Specialist.
It depends on your goals.  The real question to ask is:  Is there enough fat available to accomplish your goals?  If the answer is no;  then I agree your other options are Implant +/- fat grafting.  Another option is Medical Grade Permanent Fillers that can be used to give additional volume if you did not want to use an implant.Best of Luck!  Please reach out if you have any further questions or concerns.
Matthew J. Nykiel, MD#TopREALSELFDoctor#CoreREALSELFDoctorButt Augmentation SpecialistLiposuction SpecialistBoard Certified Plastic Surgeon

You likely need to gain weight as you currently don't have enough fat on your body to have a good result. Watch this brief video for more information.Best wishes,Dr.Bruno

I think that you can likely get what you want as long as the board certified plastic surgeon that you select has great experience with thinner patients. 

I appreciate your question.

I specialize in Brazilian Butt lifts and body contouring procedures.  The amount of enhancement possible depends on how much fat can be harvested from your body.  I do not recommend patients gain weight prior to the procedure.
The best way to assess and give true advice would be an in-person exam.

Please see a board-certified plastic surgeon that specializes in aesthetic and restorative plastic surgery.

Best of luck!

Dr. Schwartz

Board Certified Plastic Surgeon

#RealSelf100Surgeon

#RealSelfCORESurgeon

I would recommend an in person consultation to evaluate how much fat is available for the transfer.  Fat can be harvested from multiple areas like arms and thighs. Seek a plastic surgeon who performs hundreds of these procedures, has great reviews and photos, and is an expert in this field.

Hello and thank you for your question.  It is hard to give you advice without photos.  There are people with your height and weight who do not have enough donor fat for transfer to the buttocks to make a difference whereas there are other people who have more than plenty and can have a great result -- in other words, it is not just based on your BMI, but your body fat percentage and more, importantly, the distribution of fat.  Your best bet is to schedule a consultation with a board certified plastic surgeon with expertise in advanced body contouring techniques.  I hope this helps and I wish you the best of luck!Sincerely,Dr. Sean Kelishadi

Thanks for your question.  It is always difficult to comment on topics such as this without seeing a photo and especially without seeing you in person.  However, at 5'5" and 120 pounds, you are very small.  At that height and weight you very well may NOT have enough fat to make a really noticeable difference after a BBL.  In some cases I do indeed recommend some weight gain prior to BBL, and this very well might be your situation.Be sure to consult with a board certified Plastic Surgeon who can examine you and make the final determination about the amount of usable fat you have prior to BBL.  Best wishes! 

Hello nicoleyermanos,
The Brazilian butt lift procedure involves removing all of the available fat from your body and then processing it and transplanting it back into your buttocks cheeks. Thus, you must have adequate fat reserves to have a Brazilian butt lift performed. 
Considering buttock implants, patients will find their buttock implants comfortable and not noticeable. This is because the buttock implants are made of soft but firm silicone material that is soft enough to sit on, but firm enough to avoid implant failure from repeated compression from sitting. The best way to appreciate the softness yet strength of the buttock implants is to feel them for yourself. 
It is recommended to schedule a consultation with a board certified plastic surgeon with at least 10 years of experience to discuss your desired goals and surgical options.