1 doctor weighed in:

What could cause blood under fingernails. With no injury?

1 doctor weighed in
Dr. Martin Tamler
Physical & Rehabilitation Medicine

In brief: Subungual hematoma

Blood underneath your nail 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. Any repetitive motion of the finger could lead to a lifting and separation of the nail from the base leading.

In brief: Subungual hematoma

Blood underneath your nail 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. Any repetitive motion of the finger could lead to a lifting and separation of the nail from the base leading.
Dr. Martin Tamler
Dr. Martin Tamler
Thank
Get help from a real doctor now
Dr. Christopher Crosby
Board Certified, Dermatology
13 years in practice
93K people helped
Continue
111,000 doctors available
Read more answers from doctors