“There are many reasons why nails and flesh can separate, and grey nails are just one of them. “Grey nails, also known as onychomycosis, is a disease caused by ringworm that infects the nails and is often characterised by cracked, brittle or thickened nails that are brown or black in colour.
If the separation is accompanied by darkening of the nails, it is possible that the patient has ‘grey nails’, and skin conditions such as demodicosis and sub nail warts can also cause separation of the nails from the flesh.