Hi, 34-year-old female. I have chronic sinusitis, and after the final round of antibiotics, white scales like plaque appeared on my lips. My dermatologist says it isn't related, but she also has no idea what this could be. Does anyone have any idea? As far as I can tell, that's the only place this appeared. This is what it looks like. https://ibb.co/82rhn6Z
Thank you for your help!