I've been using tresemme for a few years and have had an itchy scalp for just as long, for a while i put it down to the hair colour i was using so stopped using it but the itch continued. eventually i decided to try another shampoo, so i just lifted the first thing my eyes landed on in asda which was herbal essences, it took the itch away but didn't actually wash my hair properly and took two shampoos each wash and lots of it to even get a lather (my hair is a short bob and i was using about a full palmfull of shampoo!)
so what do i buy now?- I've gone back to tresemme just for the fact that it at least washes the hair but my scalp is sore and itchy again and it's getting unbearable.