What could very tiny reddish or black specks under the skin on a finger after falling and hitting hard be?

Subungual hematoma (blood blister): This occurs when blood collects under the nail. It can cause the nail to appear discolored, and it may be painful. Subungual hematomas are usually caused by trauma to the finger, such as dropping something heavy on it or hitting it against a hard surface.

Splinter hemorrhage: This occurs when a small blood vessel in the nail bed is damaged. Splinter hemorrhages appear as thin, red or black lines under the nail. They are often caused by minor trauma to the finger, such as stubbing your toe or biting your nails.

Melanoma: This is a type of skin cancer that can occur in the nail bed. Melanomas appear as dark brown or black spots under the nail. They can be difficult to distinguish from other types of nail discoloration, so it is important to see a doctor if you notice a new spot under your nail.

If you are not sure what is causing the reddish or black specks under your skin on your finger, it is important to see a doctor to get a diagnosis.