An overactive or underactive thyroid gland can cause hair loss. So can iron deficiency.

例如甲状腺过度活跃或活性不足、缺铁等。

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The hot water activates the sebaceous gland which secretes oil and can leave hair greasy soon after washing.

热水会激活分泌油脂的皮脂腺，洗完头发以后很快又会变油。

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Esophagus cancer is to point to former hair the cancerous tumor at esophagus, basically include scale cancer, gland cancer, did not split up caruncle of cellule cancer, cancer.

食道癌是指原发于食道的癌瘤，主要包括鳞癌、腺癌、未分化小细胞癌、癌肉瘤等。

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