Oh my god! I have had lice once for a year and a half OMFG!! It did more than suck. In the end I got rid of them with a bandana covered in metho on my head!!! A girl in my math class has lice she has had them for like four years, when questioned about it, she changes the subject :/ I just don't want them again!
I've had them and I was called nitty Nora for years. If I got them now I'd either wash my hair in vinegar or use masses of conditioner.
I caught head lice loads of times as a kid. They are horrible little buggers! I tried a lotion 'headrin' and it was the most amazing lotion I ever had! Put it on in the night. Go to sleep (put towel on pillow) and in the morning they will all be dead on the pillow. Wash your hair and comb out any eggs that hadn't come off the hair. Then wash hair again. It's brilliant stuff! I would recommend it to anyone with lice problems cause it's so damn good!