The context of the following conversation is Riley came home from their camping trip with lice, so Riley shaved their hair off.:
Riley says Oh God my hair is itching..
The friend responds Let me take a look at your scalp. Is it burning?.
Riley responds Yes. It hurts. Ever since we came back from camping..
The friend responds Oh I see the problem. You have lice Riley. You must have picked them up on the camping trip..
Riley responds Well, I cut off all my hair now..
The friend responds That should cure the problem. Just remember to change your linen for the next few days..