Why kids in Fukushima having frequent bloody nose?

There are many Fukushima children getting bloody nose. What is happening? I heard from the blog of a man living within 10km from the plant got headache and the bloody nose after the explosion. What will happen to these children? Isn't this something already taking care by the WHO or UNICEF? It looks like "dictatorship-socialist" Japanese government is hiding something.



(http://www.asyura.us/bigdata/up1/source/4837.jpg)