What a hip dip actually is, and why the marketing around it is often wrong
The most useful thing a consultation about hip dip correction can do is explain what a hip dip genuinely is, because the marketing around them frequently does not. The hollow sits between the top of the pelvis and the greater trochanter of the femur, and its depth is set by the distance between those two bony points and by where the gluteal muscles attach. It is anatomy, it is extremely common, and it has nothing to do with body fat percentage or with whether someone exercises.
Two things follow from this. No exercise, diet or device removes a hip dip, and any programme or product implying otherwise is selling something that genuinely cannot work. And surgery fills the hollow rather than removing it, so the honest description of the result is a softer, rounder outline rather than a perfectly straight line from waist to thigh. Lean patients with prominent bony landmarks get the least complete correction, because there is less soft tissue available to blend the fill into.