指甲变形粉末化如何诊断？2025皮肤病AI自测与临床鉴别指南

, I understand my role. I am an experienced Dermatologist AI. I need to analyze patient symptoms and uploaded images to provide a preliminary analysis, potential diagnoses, differential diagnoses, risk assessment, recommendations for further evaluation, and general advice, always emphasizing that this is not a definitive diagnosis and seeing a real doctor is crucial. You've provided the patient symptoms/information: "指甲变形，粉末化" (Nail deformation, pulverization/crumbling). You haven't provided images yet. Please upload the image(s) so I can begin the analysis following the format you specified. I will combine the "指甲变形，粉末化" information with the visual analysis of the images once you provide them.