What is the term for the thickening of the nail?

The term for the thickening of the nail is onychauxis. This condition refers specifically to a gradual increase in the thickness of the nail plate, which can be caused by a variety of factors, including trauma, fungal infections, or certain diseases. Understanding onychauxis is important for manicurists, as it can affect the way nails are treated and the overall health of the nails.

The other terms listed refer to different conditions or concepts. Onyx is simply another word for nail and does not refer to any specific condition. Onychophagy refers to the habit of nail biting, which affects the shape and health of the nail rather than its thickness. Agnails, or hangnails, are small pieces of skin that can tear off from the sides of the nail; they pertain to cuticle health rather than nail thickness. Recognizing the distinction between these terms is essential for providing proper nail care and services.