Exposure of cartilage in the nasal septum or nasal cavity is one of the symptoms of nasal bone fracture. Nasal bone fracture is often caused by trauma, and clinically there are lacerations of the nasal cavity and nosebleeds, which can be closed or open. They can be closed or open. They are often accompanied by fractures of other facial bones or the base of the skull. The nasal bone is located below the frontal bone in the nose, which is the most prominent part of the human face. It is the most prominent part of the face, and the thin structure of the nasal bone makes it very susceptible to fracture when traumatized. The degree of fracture varies depending on the circumstances of the violence, and the nasal bone may show a variety of imaging patterns. The following are some of the reasons for exposure of the nasal septum or cartilage in the nasal cavity: The external nose is located in the center of the face and resembles a cone with a base in the lower part of the face. The upper end is located between the eyes and is continuous with the forehead, called the root of the nose, and the lower end protrudes forward as the tip of the nose. Between the root and tip of the nose is the bridge of the nose, on both sides of the bridge is the dorsum of the nose, and the semicircular bulges on either side of the tip are called the nasal wings. There are two openings below the external nose, called the anterior nostrils. The small column between the two nostrils is called the nasal columella. The shape of the external nose consists of bone and cartilage forming a scaffolding, covered with skin and soft tissue. Nasal bone fractures tend to occur in the nasal bridge and cartilage. The frontal nasal eminence, nasal bone, and maxillary frontal eminence are the bones that directly support the external nose, and the median plate of the sieve bone is the indirect supporting bone of the external nose. The lower edge of the nasal bone, the inner edge of the maxillary frontal process, and the free edge of the maxillary palatine process together enclose a bony nostril called the pyriform foramen. The nasal bones, one on the left and one on the right, are irregular trapezoidal bone fragments that are very inconsistent in size and shape. The nasal bone is located in the highest part of the bridge of the nose and has 4 edges, upper, lower, inner and outer, and 2 surfaces, anterior and posterior. The upper edge is narrow and thick, jagged, connected to the nasal frontal suture and frontal nasal protrusion, which is a strong attachment point for the nasal bone, making the nasal bone support the external nose and have a good protective effect. The lower edge of the unfolding like a fan, thin and sharp, through the tough connective tissue and the side of the nasal cartilage continuity, here easy to injury and fracture caused by the collapse of the bridge of the nose. The medial margin is thicker at the top and thinner at the bottom, joining the medial margin of the opposite nasal bone with the interosseous suture, and forming a thick bone ridge behind it. The entire length of the lateral margin is connected to the maxillary frontal process by the nasomandibular suture, thus forming the width of the dorsum of the nose, which is easily dislocated by trauma. The anterior or lateral surface is smooth, slightly concave in the upper part and bulging in the lower part, and there is a small nasal foramen near the center, which is the vascular nerve pathway. The posterior or medial surface is concave, with a longitudinal sieve bone hook, for the nasal ciliary nerve branch passes through. In its inner half, there is a bony ridge, which becomes more and more prominent as it goes upward, forming a thick ridge with the contralateral bony ridge, which connects with the frontal spine, the anterior and superior margins of the median plate of the sieve bone, and the cartilage of the nasal septum from the upper to the lower part of the spine. If the middle plate of the sieve bone and the nasal septal cartilage are broken or dislocated, the gravity of the external nose will pull them downward, which can also lead to the collapse of the bridge of the nose.