In the life of the patient a nostril inside feel some itching and pain, it is likely that the nostrils inside the presence of foreign objects, may be accidentally flying insects into the inside, or when eating accidentally choking food to the nostrils inside, the patient did not care about it, time is likely to lead to inflammation inside the nasal cavity, so it will itchy, painful. In this case, the patient needs to go to the hospital to check, check a nasal endoscopy can be a clear diagnosis. There is also a case that the nasal mucosa is congested and edematous after a rush or a cold, and sometimes there will be unilateral nostril itching and pain. The patient’s nostrils have polyp formation, and after a cold, it is easy to lead to infection in the nasal cavity, so there will be itching and pain, and must be actively symptomatic treatment, the patient’s clinical symptoms will be improved.