What is the reason for fingernail hair empty?

The reason for this phenomenon is considered to be hand eczema, especially sweat herpes eczema, because the hands sweat especially much, and then the nail week skin damage, after the destruction of nail malnutrition caused by symptoms. Also rule out onychomycosis, normal onychomycosis is caused by fungal infection, then this situation needs to see a doctor, and then do a fungal microscopic examination to be clear at the doctor's suggestion.