Discoid lupus erythematosus in dogs is an immune-mediated skin disease affecting the nose and face, requiring sun protection and immunosuppressive therapy for effective management.
DLE causes painful nasal ulceration that affects dogs' ability to sniff, explore, and engage in normal daily activities. Sun exposure reliably worsens disease, creating management challenges for dogs that enjoy outdoor activities. The cosmetic impact of nasal scarring can influence owner perceptions of quality of life. Regular sunscreen application and activity modifications can meaningfully reduce suffering while maintaining quality of life. The condition requires ongoing management commitment from owners.