Nasal ulcers, i.e. ulcers of the nasal mucosa, are mainly related to inflammation, tumor, environment and other causes. 1. Inflammation: it is mostly considered to be caused by chronic inflammation, such as atrophic rhinitis, sinusitis and so on. Repeated stimulation of the nasal mucosa by inflammation and frequent nose blowing can lead to damage of the nasal mucosa and the formation of localized ulcers. 2. Tumor: in addition, nasal mucosal ulcers may be caused by the ulceration of the surface of the tumor itself. 3. Environment: Nasal ulcers may appear if they are exposed to certain chemical gases for a long time, often stay in hot or dry environment, blow or pick the nose. Nasal mucous membrane ulcer patients need to strengthen the daily life management, go to the hospital in time to get a clear diagnosis, cooperate with the doctor to treat actively, and have a regular review.