A healthcare provider can diagnose hematomas of the nasal septum by looking at the nose. Sometimes x-rays are done to view the nasal bones and facial structures to make sure there are no fractures. Cranial CT scans and cranial MRI scans can detect more serious injuries. If a person is on medication, blood tests will be done to check the ability of the blood to clot. A complete blood cell count, or CBC, will often be ordered to check for anemia, or a low red blood cell count.