She has not recently spoken about fillers, but other surgeons have also speculated the star has been using them — with one saying only last month that her face now appears to be 'overfilled'.

Cheek fillers work by adding volume to certain areas of your cheeks, which can change their shape. This can make your cheekbones look higher and give you a more youthful appearance. The procedure ...

It follows, then, that those same patients are likely to reach that “overfilled” point at a relatively young age; plus, filler might even begin to migrate to a different part of the face.

He tells PEOPLE that her case was unique because he's never encountered filler in areas of the face where she had it, despite having it reversed beforehand — that's how "overfilled" she was.

The longer-lasting filler doesn’t allow for that option. The fillers used for cheek augmentation tend to be long-acting and can be calcium-based. This filler is used for very deep fillings. This type ...

Khloé shared pics of just how long the scar was from her surgery, and explained what they did to help fill in her cheek: “We put a biostimulant filler in my face. It's a larger size that we ...