What's wrong with yellow toenails?

Toe nail yellowing, consider the following reasons: the first, due to long hours of work caused by, it is recommended to take a proper rest, usually can be soaked feet, relieve the pressure on the feet. The second, consider the foot cleaning done improperly, it is recommended to change shoes and socks regularly, regular nail trimming, to prevent dirty things residue. The third, consider the lack of trace elements caused, but also accompanied by the phenomenon of brittle nails, oral calcium tablets and zinc gluconate oral solution.