我的孩子今年12岁。从3年级开始,他有了咬指甲的习惯。这个习惯不好,但想到孩子还小,也许长大就会改掉了,所以没太在意。没想到,这个坏习惯一直伴他至今。有时候,我们见到他咬指甲就大声呵斥,甚至去打他的手。可是孩子依然如故,真是非常无奈。该怎么办呢! My child is 12 years old this year. From the third grade, he had the habit of biting nails. This habit is not good, but think of children is still young, maybe grow up will be changed, so do not mind too much. Unexpectedly, this bad habit has been with him so far. Sometimes we bark nails to see him shout loudly, or even to hit his hand. But still the same child, really helpless. what can we do about it!