I've had an itchy scalp for over a year, lost over 3/4 of my hair. I've been through all the meds the recommendations offered by everyone, don't think there is anything I haven't tried.
Well anyhow, this is what worked for me and it may or may not work for you: In a plastic container add a quarter teaspoon of tincture of iodine (the brown liquid) and about a quarter cup of warm water, mix. Daily during your shower, wash hair with cool water without any shampoo or conditioner, then apply this mixture as a final rinse, whilst ensuring none of it gets in to the eyes. Immediately wrap a clean towel to the hair. Leave hair to dry naturally and before you know the hair feels softer and manageable - the plus factor 'No Itching".... Hurrah! I also use this mixture for my final rinse after my weekly shampoo and conditioner application. Initally I used this mixture for 4 days, had a break for a couple of days, the itching returned with a vengence. Good luck. Kate