Black Toenail: Common Causes If your toenail turns black, it's most likely a bruise under the nail, technically called a subungual hematoma. Black toenails can be caused by an injury, infections, diabetes, and more. Learn how to get rid of a black toenail and when to see a healthcare provider.
A black and blue toe, medically known as a contusion or ecchymosis, signals underlying tissue damage. This discoloration results from broken capillaries beneath the skin or, commonly in the toe, under the toenail. When small blood vessels rupture, red blood cells leak into the surrounding soft tissue, creating the familiar purplish.
A black toenail, often called a "subungual hematoma," occurs when there is bleeding or bruising underneath the toenail due to trauma or other causes. It gives the appearance of a blue color of your skin, including the skin under your nails. The lips, fingers, and toes may appear blue.
Restricted blood flow can cause discoloration under the nail. The big toe is the one most often injured, and this can result in a black-and-blue nail. Bruised, broken blood vessels cause the black and blue colors under the nail.
This may occur due to repetitive injuries. If you had a sudden injury, your toe can be very painful. How are black-and-blue nails diagnosed? Your health care provider will talk with you about your symptoms and physical activities.
A blue toenail, or subungual discoloration, is a noticeable change in color beneath the nail plate, ranging from dark purplish-blue to slate-gray. This symptom occurs when the tissue under the nail (the nail bed) reflects a change in blood supply or the presence of an abnormal substance. Black Toenails: Bumps and Bruises Understanding Black Toenails: Causes and Concerns Think back to the last time you had a bruise-maybe on your arm, thigh, or elsewhere.
You likely recognized that familiar black-and-blue patch right away. Bruises on the skin are common, but when discoloration appears under a toenail, it can be more concerning. When your normally healthy nails turn black or blue, it can be concerning and sometimes indicate underlying health issues.
This comprehensive guide explores everything you need to know about black and blue nail discoloration, from common causes to effective treatments and prevention strategies. The causes of a black toenail can range from toenail fungus to skin cancer. Here's what it means, how to treat it, and how to prevent it.