Try Denorex Coal Tar 2.5% shampoo. Moisten hair (but not to the point of saturation), put the shampoo first at the base of neck where the hair starts and also concentrate on the hair around the ears. Leave it on for 30 minutes with a towel on your head. It will BURN and be somewhat uncomfortable for that 30 minutes, but when you see all those dead bugs in the water, you will be glad you tried it. I think, as another poster said, the shampoo "cooks" the lice and nits. Also, before treatment I visibly had nits on my hair line and the day after treatment, they were gone. Apparently, the shampoo works well with lice. You have to repeat the treatment every day for a week to make sure you're OK and you also have to be diligent about cleaning your clothes and environment.
My daughter and I both wound up with a 'rash' on our necks, upper backs and shoulders. Our doctor prescribed some cream that didn't work. Other people suggested heat rash, since it was summer and we both had really long hair. And still others thought it might be a shampoo allergy.
During the two months this lasted, I had gotten a lice comb and checked her hair, just as she checked mine, but we didn't see any bugs or eggs. (I think they just didn't show up in her hair and she wasn't sure what she was looking for in mine!)
Anyway, I read something online that lice move very quickly but that hair conditioner will paralyze them temporarily so I finally got some and tried it and, sure enough, my daughters hair was chock full of bugs! So was mine!!!
We tried lice shampoo, we tried oil and I don't even remember everything else, to no avail.
Finally I found something about Denerox and thought, why not.
We scrubbed it in, left the shampoo in our hair and wrapped our heads with towels for 30 minutes, per the instructions. And the lice was gone, never to return.
I believe that it worked because Denorex on your towel wrapped head gets REALLY warm. Almost uncomfortably warm. And my theory is it not only 'cooks' the bugs, it 'cooks' the eggs, too! Kind of a disgusting thought, but whatever!
So I wouldn't mess with anything else, should this ever become a problem for my family again.
Denorex shampoo it must be the Denorex that has coal tar. The salicylic acid one does not work. This kills live lice on the first time you are lice free. I wash my hair in it and let it set a few minutes maybe 5 then rinse and wash once again. I then use it once a day for 14 days just to make sure I did not miss any or eggs that may have hatched.