观指（2 / 2）

指甲点凹

最常见于银屑病，其次为斑秃、肢端皮炎或湿疹、扁平苔藓等。

脆甲奒</span>

指甲质地松脆，有纵嵴，容易断裂，可见于周围循环障碍、缺铁性贫血、长期碱水浸泡等。

指甲变薄

见于发育缺陷、末梢循环障碍、扁平苔藓等。

竖条纹

多是缺乏维生素a。

横纹

多由缺乏营养引起，心肌梗塞发病前也可出现。另外，可见于肠道感染或肺炎。奒</span>

横贯的白色线条

多见于砷、铅等金属中毒，或霍奇金病、糙皮病等。

软甲

指甲软而不坚，多是营养不良的表现。

指甲隆起

指甲的横脊和纵脊高度弯曲隆起，多见于慢性肺病、先天性心脏病、甲状腺疾病、肝硬化、骨折、溃疡性结肠炎和某些恶性肿瘤等。

匙状甲奒</span>

指甲变薄，中央凹陷，边缘翘起如匙，常见于低血色素性贫血、长期缺铁或甲状腺功能亢进、肾上腺功能亢进、风湿热、钩虫病、梅毒等症。

圆形甲

多见于心脏病、肺病、长期缺氧、肝萎缩、肾衰竭等。

……

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