How is foot armour blackened to return a responsibility

about the toenail blackening disease in the clinical see more, roughly divided into onychomycosis, onychomycosis, nail mother mole and so on, but not very good to distinguish, onychomycosis is not necessarily gray, there are many nails are also black, generally manifested as nail thickening, or under the nail empty white powdery things. Treatment of onychomycosis, oral antifungal drugs or surgical nail extraction, nail mole in clinical is also more common, generally manifested as a strip from nail root to nail tip, generally do not need treatment, but may develop into nail melanoma, so usually pay attention to more observation, if the variation, should actively seek medical treatment.