Which nail disease is characterized by inflammation of the matrix and shedding of the nail plate?

Onychia is a nail disease characterized by inflammation of the nail matrix, which can lead to the shedding of the nail plate. This condition often results from infections, trauma, or other underlying health issues affecting the nail matrix. The inflammation disrupts the normal growth and attachment of the nail, causing it to detach. Understanding this condition is essential for nail care professionals as it highlights the importance of monitoring and maintaining the health of the nail matrix to prevent further complications.

The other conditions mentioned, while related to nail and skin health, do not specifically address matrix inflammation and nail plate shedding. Psoriasis can cause changes in the nails but primarily affects skin and joint health. Athlete's foot is a fungal infection of the skin on the feet and does not directly impact the nails themselves. Paronychia involves inflammation of the tissues surrounding the nail but does not typically result in the shedding of the nail plate like onychia does.