The discoloration of a toenail to a black or dark purple hue typically indicates the presence of blood beneath the nail plate, a condition known as a subungual hematoma. This often results from trauma to the toe, such as stubbing it, dropping a heavy object on it, or repetitive pressure during activities like running or hiking. The trapped blood causes the dark appearance, and depending on the severity, may be accompanied by pain and throbbing.
Understanding the underlying cause of toenail discoloration is crucial for appropriate management and prevention of further issues. While often benign and resolving on its own, a subungual hematoma can sometimes mask more serious conditions, such as melanoma. Recognizing the difference between a bruise and other potential causes allows for timely medical intervention when necessary, preventing complications and ensuring proper nail health.
