Onychosis Kevin Nicholls 01/10/2021 81 Views A disease or deformity of the nail. There are many diseases that fall into this category, such as onychomadesis, onychocryptosis, paronychia, onycholysis, melanonychia, etc. Related Articles: The Complexity of Curing UV Nail GelsUV cured nail coatings are the most technically sophisticated and complex products in the beauty industry...