If the nail surface is rippled or pitted, this may be an early sign of psoriasis or inflammatory arthritis.
2
另一种皮肤――牛皮癣，湿疹，也会有相似的症状，肤色变红、发痒、头屑滋生。
Other skin conditions—such as psoriasis and eczema—can also cause a similar condition in which the scalp gets red, itchy and produces flakes of dandruff.
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