What cream can be used to increase butt size?

Although it seems to be a popular question lately, "cream (or pill) to increase buttock size?", no such thing exists.  Other than rigorous exercise or significant weight gain, surgery is the only other way to augment the buttock and quickly.  Allow me to share with you some information that you may not hear elsewhere. There are
only two proven safe and relatively effective methods for Buttock Augmentation
and Hip Augmentation: 1) Autologous Fat Transfer (using your own fat,
transferring from one area of the body to the other) and 2) Buttock/Hip
Implants (semi-solid silicone rubber implants that cannot rupture &/or
leak). Both are very good options so what it comes down to, like any surgery,
is proper patient selection. Indeed because at least 50+ % of the fat
transferred will melt away within a year, most patients are not good candidates
because they lack an adequate amount of fat to harvest. Another tip is that if
you purposely gain weight (i.e. fat) for the procedure, the fat you lose first
as you get back to your baseline weight is that very same fat that was
transferred into your buttock...so don't fall victim to this
recommendation.  Although using your own fat is relatively safe, the one
serious complication that can rarely (< 1%) happen is "fat
embolism" in which some of the fat gets into the blood stream and travels
up into the lungs, heart, and/or brain causing serious problems. This
complication is more likely to happen with the larger amount of fat being
transferred. This is
even more likely to happen when using fillers like PMMA and hyaluronic acids.
Also fillers, when injected in large quantities, have a relatively high
tendency to migrate away from the original area they were placed and tend to
stimulate a lot of inflammation and a subsequent disastrous amount of scar
tissue/hardening.

Thus
buttock/hip implants become a very good, safe, and long term reliable option
for most patients seeking buttock augmentation (at least in my practice). I
prefer to insert the buttock implants through a single 2 ½ inch long incision
over the tailbone (concealed within the crevice between the buttock cheeks) and
the hip implants through a ~ 1 inch incision just below the beltline above the
hip region. The buttock implant should always be placed under or within the
gluteus maximus muscle. In this position, the implant is less palpable, less
visible, and does not sag or shift/migrate over time unlike implants placed on
top of the muscle. Therefore it is extremely important to seek consultation
with a board certified plastic surgeon who specializes in this procedure. And
in this case too, at least in my surgical practice, the infection rate is
minimized to ~5%. Glad to help.