Abnormal nasal mucosa morphology Nasal ulcer 2020-12-02T21:00:12Z An open sore of the nasal mucosa. Nasal ulcers may occur due exogenous factors, such as trauma, pressure or inhalation of metals dust or aerosol. Nasal ulcers may also be a sign of an underlying disease, for example malignancies, infections (tuberculosis, leprosy, leishmaniasis), vasculitis (Wegener's granulomatosis, Churg-Strauss syndrome) or systemic lupus erythematosus.