Dd2 has been scratching her head like mad over the past few days. I've looked, dh has looked, and my mum (ex-teacher, plenty of experience!!!) has looked - can't see any nits or lice. But her scalp, round the edges (behind her ears), and down the back of her neck, has sore patches on it.
We haven't changed her shampoo or our washing powder recently - I am mystified. Any ideas?