Self-induced nasal ulceration from trigeminal trophic syndrome.

Trigeminal trophic syndrome is a rare entity characterized by the presence of ala nasi ulceration, trigeminal anesthesia, and paresthesia. It arises secondary to trigeminal nerve injury. Patients with this diagnosis often undergo repeated skin biopsies to rule out suspected nonmelanoma skin cancer due to the clinical appearance. Recognition of this entity is paramount to avoid unnecessary surgical intervention and to attempt therapy.