Definition: Anhematomas are a type of bleeding, characterized by a cluster of blood vessels that connect to each other, leading to an accumulation of blood in the area around the wound site. Definition: Hematoma: A collection of blood in the body due to trauma or injury, such as when you bleed. Anhematomas are collections of blood in the body because there is damage or a disruption in the tissue around a wound. Example: When you have an anemhematosis, you will likely experience bleeding from cuts and wounds on your face or neck. Definition: Hematoma: A collection of blood in the body due to trauma or injury, such as when you bleed. Anhematomas are collections of blood in the body because there is damage or a disruption in the tissue around a wound. Example: When you have an hematomas, it's like a small, bleeding hole in your skin that can cause pain and swelling.