With blender, how can I use the sculpt tools to modify a part of my mesh to "contort" around another part of the mesh?

Essentially I wanted to thicken up one of my avatar's thighs a bit, however she has a leg band that grips on said thigh, if I try to increase the leg's mesh size it just ignores the leg band and goes above it, then I'd have to re-size the band after. Instead I want the leg to "mold" around the band so it shows a bit of spilling, as if the band is tightly gripping to the leg? I'm sure it's some sort of setting(s) to do this kind of sculpting but I'm not sure? pls help, will also post the finished result after when i can get it to look nice