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What can cause blood under my toenail?

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)

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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.