Abby Doesn't Have Lice...

so why has her head been itching for the past two weeks? I took her to the doctor today because the scratching is leaving scabs on her scalp. And it's driving her bananas. Also because all the kids are being checked for lice at school because someone else had it. The doctor said, no lice, but he also couldn't give me an explaination for it either. Though I did walk away with a perscription of lotion to rub on her scalp.