头发干枯易断、指甲易断、体重骤增或骤减可能是甲状腺疾病的征兆。

Thyroid disease can manifest itself in dry, brittle hair, brittle nails, and weight gain or loss.

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在极少数情况下，黄指甲可能表明一个更严重的疾病，如严重的甲状腺疾病或牛皮癣。

In rare cases, yellow nails can indicate a more serious condition such as severe thyroid disease, lung disease, diabetes or psoriasis.

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如果你的脚趾填满了鞋头，那你可能要忍受这些脚部疾病，比如黑指甲、水泡和足部麻木。

If your toes are crammed in the front of the shoe, you could experience foot problems such as black toenails, blisters, or foot numbness.

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