(I posted this in November for someone else...hope it helps you! sorry you are going through this!)
In May, my daughter's BFF spent the night here (and we had a total of 6 kids spending the night) and she had lice, knew she had it and didn't say a word! (mom should have kept her home!) A few days later, my daughters head was itchy was itchy, I didn't think much of it...trimmed her gorgeous, blonde hair, that was down to her waist, on Friday night. Sat, she was still itching really bad...so as a precaution, I thought I should check for lice...and OMG...she was infested! I was horrified, not knowing where they came from! I went into hyper clean mode! Hubs, son and daughter all power cleaned...we washed every piece of bedding, rug, curtains, and toy we could (and everything else went in plastic bags in the garage...O, and we threw all brushes, and hair things in the freezer for a week) I ran to the drug store for the shampoo (had to buy 2 kits since she had such long hair.)
**I should say that we went so overboard w/ cleaning because I run a home daycare AND we were leaving for a Disney trip in less than a week w/ FOURTEEN people!!!!!
So...I treated her w/ the shampoo, and spent 4 long hours combing through her hair. The next day, I called the pharmacist and doc for advice...both said I could treat her again sooner than directions said and that it would make my life easier if we cut her hair (the reason it was so long was because she planned on donating it to Locks for Love.) After many tears from her and I, we cut it and then I continued to comb through it 2x a day and I also made her sleep w/ Olive Oil in her hair, covered by a shower cap for 3 nights. (a friend, who is a hairdresser and has dealt w/ this suggested it...it suffocates the lice.) I felt awful making her do this...it was gross and uncomfortable!
I had to close the daycare and she missed school...so there was a lot of cost to this! All because a mom was irresponsible and "didn't think" when she let her daughter spend the night! Anyway...it can be gotten rid of...but I will tell ya...I hope to NEVER go through that again! Best of luck!