Apart from respiratory symptoms, diphtheria can cause cutaneous lesions. Diphtheria causes shallow ulcerations of skin. The lesions are usually chronic. Secondary infections are common. Reference: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3322786/#:~:text=Cutaneous%20diphtheria%2C%20still%20endemic%20in,body%20and%20are%20usually%20chronic.