Why do you check your head for lice if exposed?

what do you mean if exposed?

But you check for headlice so you dont have them and you dont

give them to anyone else.If you have someone checking you for lice,

cause you cant do it on your own,and they find white and it is hard to move,

it is hatched lice eggs or 'nits'.If they are brown/grey,they are not hatched.