head lice question
HELP! I just found head lice on my 9 year old daughter. She has very thick long hair and I noticed a bug on the top. After inspection, I realized that there were more of them. I checked my other two daughters and noticed a few dandruff looking things. I assumed they were nits but how do I tell if it's just the seborreah dermatitis that they already have? They have white patches and flaky skin in spots. I'm not sure whether to treat the other two or not.