Malignancies
Malignancies are abnormal cell growths that tend to occur in the body’s tissues and can cause various symptoms. The malignant cells that make up these tumors will grow unchecked and without any control from the immune system or other cells. In some situations, these tumors can invade nearby healthy tissue, but this is not always the case.
A malignancy can cause inflammation in the surrounding tissue, leading to splinter hemorrhage, basically bleeding under the skin. The malignant cells that cause splinter hemorrhage typically come from a malignant cancerous tumor on or near one of the bones in your fingers or toes.
When the tumor grows, it presses against blood vessels, causing them to burst and causing bleeding under your skin. This may result in an ulcer-like area on your finger or toe where you experience pain and possibly even a dark red color to the site. However, splinter hemorrhage is often small and can be hard for doctors to detect unless you have a more advanced form of cancer in your bone that results in larger areas of bleeding under your skin.