Does having a BBL make your thighs thicker too?

A BBL will not necessarily make your thighs thicker. It may help round out your hips a bit more and that is part of the upper thigh region. It depends what you are looking for.

A BBL does not make your thighs thicker unless you place the fat in them (most commonly at the lateral thighs or hips to maximize curves).  Most of my BBL's are performed placing the fat within the buttocks, but sometimes to the lower lateral portions which may affect the lateral thigh shape.Dr T

Having a BBL makes your thighs thicker if you place the fat in the lower lateral buttocks region. If you are an excellent candidate for a Brazilian Butt Lift (BBL), the optimal BBL outcomes are achieved with: 1) use of VASER liposuction to harvest the fat, 2) a closed looped system such as Puregraft to process the fat, and 3) strategic micro-packet transplant technique. These three processes have demonstrated over 95% fat graft take. This means that your results will be stable as long as you maintain your weight. As an official VASER trainer, I am routinely referred unhappy BBL patients. One of the most common reasons for disgruntled BBL patients is that patients are not able to accurately communicate their desired buttocks goals to their surgeons.  A buttocks assessment tool ban be an invaluable tool to communicate to your surgeon the exact buttocks size and shape you are desiring. A Skype or Facetime consultation with a BBL specialist can help you get an accurate recommendation and pricing.