The difference between a true aneurysm and a false aneurysm is whether the wall of the aneurysm is intact and normal or not. The wall of a true aneurysm is a real arterial vessel, except that this arterial vessel belongs to the pathological state, but still consists of three membranes: the inner membrane, the middle membrane, and the outer membrane. Pseudoaneurysm is called pseudoaneurysm due to the rupture of the arterial vessels, the blood will overflow to the outside of the blood vessels, due to the wrapping of the external tissues, the fibrous proteins are produced, so that the aneurysm is more confined, and the wall of the tube is not the real aneurysm, but it is made up of the fibrous proteins. Both true aneurysms and pseudoaneurysms are dangerous diseases, because there is a possibility that both may lead to the rupture of the wall of the aneurysm, causing the patient to suffer from hemorrhage, so it is important to go to the hospital at this time for a systematic diagnosis and treatment.