By Tahlia Urquhart Every person has probably seen or even suffered from a black toenail. This painful little foot injury is very common among people who like to move a lot. It is fairly easy to treat as it is not a chronic ailment. However, if it is not attended to early, then it might turn into something serious. There are many reasons in which one may get darkened toenails. The discoloration of this part is actually mainly because of a clot of a large amount of blood in the area under the nail. Of course the main cause would be that a large amount of force was put on the toe. Athletes...