地甲流行区的地理分布一般是在那些地质发生火山爆发的地区。这些地区富含微量元素。黑海地区东部的波涕得山区是一个地甲流行区。这个古老的火山爆发弧延伸至里海之南,富含金属元素。根据高加索流行区的材料,水和土壤中铜、锰、氟、硒和镁含量高,这些元素可能在地甲肿的形成中起一 The geographical distribution of Nodong area is generally in areas where geologic volcanic eruptions occur. These areas are rich in trace elements. Waves in the eastern part of the Black Sea Mountain is a mountain area popular area. This ancient volcanic eruption arc extends to the south of the Caspian Sea, rich in metal elements. According to the material of the Caucasus Epidemic, high levels of copper, manganese, fluorine, selenium and magnesium in water and soil may play a role in the formation of guts