Nasal septum is the septum that resides in the middle of the nasal cavity, consisting of the vertical plate of the sieve bone, the plow bone and the cartilage of the nasal septum, and the surface is covered with mucous membrane. The nasal septum is located in the middle of the nasal cavity, dividing the nasal cavity into two parts, the front through the nostrils to the outside world, and the back through the posterior nasal aperture to the pharyngeal cavity. The nasal septum consists of bone, cartilage and mucous membrane. The cartilage of the nasal septum serves the function of supporting the nose and making it three-dimensional and aesthetically pleasing. There is a venous plexus in the anterior and inferior part of the nasal septum, which is a good site for nosebleeds. Most normal people have some deviation of the nasal septum. When the nasal septum deviates from the midline and bends to one side or both sides or forms a localized protuberance, which causes nasal dysfunction or produces symptoms, it is called a deviated nasal septum. Deviated nasal septum can be caused by nasal trauma, unbalanced development of nasal septum or genetic factors, etc. It usually manifests itself as persistent or intermittent nasal congestion, runny nose, nosebleed, dizziness and headache, etc. If the patient feels uncomfortable in the nasal septum area, he/she may feel uncomfortable. If the patient feels uncomfortable in the nasal septum area, it is recommended to actively seek medical advice and complete a series of examinations before the doctor makes a diagnosis or exclusion.