Thank you for the question. Without photos, it is difficult to say exactly what is happening... however, I have a good guess. Transconjunctival lower blepharoplasty is most commonly performed to remove fat from the lower eyelid region. If this is done conservatively, hollowness can be avoided. However, if it is done too aggressively, hollowness may occur. In addition, when more volume is removed and the skin is not treated independently (e.g., with laser, peel, or skin pinch (surgical removal)), wrinkles will occur. In my practice, I prefer to transposition some of the orbital fat to preserve some volume. And I typically perform a skin pinch to remove a few millimeters of excess skin. At a minimum, a laser treatment to tighten the skin surface of the lower lids is generally required.