Hello, the doctor! A problem at my husband - several years ago he has dropped...

[Julia With.]

Hello, the doctor! A problem at my husband - several years ago he has dropped to itself(himself) on a leg or foot the weight, has damaged or injured;hurt a fingernail of the big finger. After a while (and till now) this fingernail has got a kind amazed or struck by a fungus (dark and exfoliating), on other fingernails or nails it does not pass. Whether a fungus it or something another? How to check up and than to cure? It delivers him inconvenience. In advance thanks.

[Albanova V.I.]

To check up it is necessary, having made the analysis. And it is how much possible to correct for it - depends on a kind of a fingernail so all the same it is necessary to the dermatologist

[Julia With.]

Belief Igorevna, thanks for the answer! Prompt, please, what analysis needs to be made?