Abstract：
Recognizing and diagnosing the most common nail diseases is essential, to be able to guide patients and provide appropriate treatment. However, uncommon nail disorders should not be neglected, in order to avoid inadequate treatment and above all to ensure that no severe underlying disorder, with severe prognosis, is overlooked.
摘要：
识别和诊断最常见的指甲疾病至关重要，能够指导患者并提供适当的治疗。然而,不常见的指甲疾病不容忽视，为了避免不充分的治疗，最重要的是确保没有严重的潜在疾病，预后严重，被忽视了。
