Health-related knowledge of Meijiajing

Onychomycosis is characterized by concave-convex deformation of the deck, turbidity, yellowing or blackening, loss of cleanliness, and changes in color, shape and texture. Nail thickening, cutin hyperplasia under nail bed leads to nail debris accumulation. In severe cases, the deck will be separated from the nail bed, and the fingernails of hands and toes of feet may be sick and easily infected, which often leads to polynychia.