This is part 2 of a 2-part series. In this part, Dr. Nasir examines the use of nanoparticles in products for special sites including the hair and nails, as well as products for the 5 senses. The use of nanotechnology in medicine and dermatology is too broad to be covered in its entirety. This review is by no means comprehensive and covers only a small subset of applications of nanotechnology in cosmetic dermatology. It is hoped that readers will get a sense of the promises and challenges of nanotechnology, as well as future applications and safety concerns. The bulk of this review was devoted to cosmetic products for the face, which was featured in part 1 of this series. This smaller portion touches on some of the uses of nanotechnology for specific body parts and for the 5 senses.