Picture of Onycholysis
Onycholysis is when your nail separates from the nail bed. It can be caused by injury, skin disease or a fungal infection. Some people with nail psoriasis also have a fungal infection that worsens symptoms. The nails can usually be treated with topical medications applied to your nails.
Text Source: Journal of the American Academy of Dermatology
American Osteopathic College of Dermatology