What is the ruling on a person in ihram shaving his hair due to the presence of lice and dirt?

Question : If a Muslim shaves his head because he is harmed by lice and dirt, he must pay a fidyah (ransom payment); because the harm is from something other than the hair. If a hair falls into his eye and he pulls it out, or if hair falls onto his eyes and he removes it, he does not pay a fidyah.

Answer : This is also one of the issues. This is a man who has lice or wounds on his head, or he removed the hair to ward off harm.
He must pay the fidyah, or does he not? By the saying of Allah the Exalted: As for if the hair overgrows a wound or his eye and he removes the hair, there is no blame on him. For example, if he has a wound on his forehead and his hair falls onto it, and he is unable to move it away, he may cut what is on the wound, and he owes nothing.
Because that is to ward off harm. Similarly, if hair falls into his eye—and I think this hair in the eye is known to you; there is hair, may Allah keep us safe from it; some people grow hair on the inside of their eyelid that harms their eye. If he plucks it with tweezers while in ihram, he owes nothing, because this is to ward off its harm. It is also established for us that there is scholarly disagreement regarding hair other than on the head: is it forbidden for the one in ihram or not? Yes.