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。
2
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。
3
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.