What can cause blood under my toenail?

National Athletic Trainers' Association

Blood underneath your toenail is referred to as subungual hematoma. Subungual hematoma is caused by fluid (blood) accumulating under the nail bed in fingers and in toes due to a jamming of your finger or toe, dropping a heavy item on your finger or toe or repetitive stress to the nail itself. (This answer provided for NATA by the Eastern University Athletic Training Education Program)

Continue Learning about Nail Disorders

Dr. Mehmet Oz, MD

Several nail disorders run in families. The most common nail infections are caused by a fungus, ...

Dr. Mehmet Oz, MD

There are two main ways in which nail disorders can cause complications to your health. First,...

Important: This content reflects information from various individuals and organizations and may offer alternative or opposing points of view. It should not be used for medical advice, diagnosis or treatment. As always, you should consult with your healthcare provider about your specific health needs.

Nail Disorders

A fungal infection, typically on the toenails, is the most common nail disorder. People with diabetes, those who wear tight-fitting shoes and those who get a lot of manicures or pedicures are most susceptible. An infected nail will be painful and discolored, with a brownish-black band. The nail also might show scars, pits, ridges or lesions. Anti-fungal medication can treat the nail. To avoid infection, keep toenails short, discard old footwear and don't go barefoot around public showers and pools.

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