Transnasal gastroscopy does not usually cause nasal injury during the procedure. Transnasal gastroscopy, also known as ultrafine gastroscopy, is able to enter the oropharynx through the nasal cavity and then into the upper gastrointestinal tract for examination. Conventional transoral gastroscopy tends to cause a gag reflex due to contact with the base of the tongue, whereas transnasal gastroscopy has a thinner tube diameter and does not generally contact the base of the tongue. A local anesthetic is applied to the nasal cavity and the anterior portion of the nasogastroscope during the examination, so the discomfort is significantly reduced. Transnasal gastroscopy is a relatively safe and effective examination method for those who cannot tolerate transoral gastroscopy because of old age, frailty or cardiopulmonary diseases. However, for patients who are very nervous and cannot cooperate, there is still a possibility of damage to the nasal mucosa during the operation. Transnasal gastroscopy generally does not cause nasal injury and excessive worry should be avoided. If you experience any discomfort after the transnasal gastroscopy, you should consult the hospital in time.