A hard lump on the head is commonly referred to as a "head bump" or "head injury lump." It can occur as a result of various causes, such as trauma, injury, or infection. The medical term for a hard lump that develops under the skin after an injury is a "hematoma."
A hematoma is a collection of blood outside the blood vessels, typically caused by broken blood vessels or capillaries that leak blood into the surrounding tissues. When this blood accumulates under the skin, it can lead to the formation of a firm, tender lump or swelling at the site of the injury.
Hematomas can vary in size and severity, and they may resolve on their own over time. However, in some cases, particularly if the hematoma is large, causing significant pain or if there are other concerning symptoms, medical attention should be sought to assess the injury properly and determine the appropriate treatment.
It's important to note that not all lumps on the head are hematomas. Other conditions, such as cysts, lipomas (benign fatty tumors), or other types of growths, may also cause hard lumps on the head. If you notice any unusual lumps or bumps on your head or any part of your body, it's advisable to have them evaluated by a healthcare professional to determine the cause and appropriate management.