If the patient’s nostrils are always itchy, it is likely to be an allergy, which is usually related to the living environment and the individual’s physical condition. Itchy nostrils will occur when the patient’s body resistance decreases and comes into contact with allergens. In terms of treatment, contact with allergens should be avoided in general, and at the same time, Dinaid cream can be applied for anti-allergy treatment. Patients with particularly pronounced itchiness can also take montelukast sodium tablets and ebastine tablets orally for anti-allergy. Patients should exercise more in their normal life to enhance their resistance, and the condition should improve significantly after a week or so of active treatment. If there is no improvement, it is best to go to the ear, nose and throat department of the hospital, the department of allergic reactions for detailed examination, and if necessary, desensitization treatment can also be considered. Patients should try to wear masks when going out to reduce the chance of contact with allergens.