Patients with reddened nostrils, generally common clinical causes are mainly the following situations. First, the patient’s nostril was bitten by mosquitoes and insects caused a local allergic reaction, the skin of the nostril can be manifested as obvious redness and accompanied by mild swelling. At this time, the patient can take oral loratadine, paracetamol and other drugs, external rubbing of the nostrils with glyburide lotion to reduce the allergic allergic reaction in the body, improve the symptoms of redness and swelling of the nostrils. Second, the patient’s nasal cavity with acute infection can cause congestion of the nasal mucosa, resulting in red nostrils, at this time, the nasal cavity can be cleaned by drops of antibacterial and anti-inflammatory drops to clear the nasal secretions, maintaining a clean environment in the nasal cavity. This can help the nasal inflammation to subside as soon as possible and reduce the symptoms of red nostrils.