Fingernails become purple, may be related to the blood, due to the end of the circulation is not good due to insufficient blood supply caused by, for example, anemia, hypoxia, poisoning and other phenomena lead to, it is recommended to go to the hospital for coagulation function of the examination. Another may be due to extrusion of the fingernail, resulting in bruising, so that the fingernail becomes purple, this is the need to wait patiently, fingernail growth is purple metamorphosis out can be improved, this situation is the need to pay more attention to the future life, if the repeated occurrence of injuries to the nails, then over time will be a serious danger to the fingernail.