I have had it for years and JUST got an actual diagnosis. The thing I have used for years that gives immediate relief that lasts for about 3 to 4 hours is Hairseptic. It helps the itching a lot but it does not cure it. Scalpacin also helps but it is way more expensive than the Hairseptic. The only place I can find it is on the internet and most of them charge $13.00 a bottle but if you search for it you can find it for $7.50 a bottle. I also use free and clear shampoo that helps a lot and can be found at Walgreens.