Given the data you have provided, it is not likely that the “dent” in your hips is provoked by tight clothes, but more likely it might be caused by the genetic distribution of tissue in your body. No matter the cause, plastic surgeons and/or dermatologists are specialists that are trained to remove tissues from one surface of the body to another one, place various implants under skin, or inject tissue fillers just beneath the surface; so you might want to see one.