White layering of toenails may be nail dystrophy, nail fungus disease, etc., and should be promptly consulted to find out the cause of the disease. 1. Nail dystrophy, is a multi-factors caused by nail damage, mainly manifested as the appearance of longitudinal ridge on the surface of the nail bed, the surface of the nail bed is similar to be polished, the top of the nail periphery has lost its normal gloss; excessive proliferation of the nail bed. 2. Nail fungal disease, also known as gray nails, onychomycosis, is generally caused by fungal infections of the skin, fingernails and toenails can occur, usually manifested as finger or toe nail surface gray thick, loss of luster, brittle or even defective, when the nail surface is too thick and squeezed to the surrounding other tissues, can cause pain. This symptom alone is not enough to diagnose the disease, but may be caused by other factors. It is recommended that the patient consult a doctor in time to clarify the cause of the disease and give targeted treatment.