What describes physical trauma or injury to the nail bed that damages the capillaries?

Splinter hemorrhages result from physical trauma or injury to the nail bed that causes damage to the small blood vessels or capillaries located beneath the nail. When these blood vessels are injured, they can leak blood, which appears as dark streaks that resemble splinters beneath the nail. These streaks typically manifest in a linear pattern, aligning with the direction of the nail growth.

Understanding this condition is important as it indicates underlying trauma. While pyogenic granuloma refers to a growth of tissue at the nail fold that can occur due to irritation or injury, it does not specifically describe the direct trauma to the nail bed. A hangnail is a small tear of the skin adjacent to the nail, which is different from the internal bleeding associated with splinter hemorrhages. Onychoryptosis, or ingrown nails, pertains to a condition where the nail grows into the surrounding skin, which again does not directly relate to capillary damage. Thus, splinter hemorrhages precisely describe the phenomenon of trauma to the nail bed and capillary injury.