Very sensitive, prevent my scalp from itchiness.

I have curly hair with a dry top layer. When I first tried this product I sought to calm my scalp, which felt itchy because of some previous shampoo. When I first washed my hair with this, it felt like a cloud of softness and relief. It feels great. I rotate two shampoos, one of which must be non-lathering cream shampoo, and this is the best one I have ever tried! 

I'm not sure if this product does contribute to the buildup on my scalp so I'm sort of on the fence with this. I will say though it is quite soothing especially on the days where my scalp is quite irritated and itchy. I also like how it sort of feels like a conditioner for the scalp as I obviously can't use my regular conditioner on my scalp. Leaves my scalp slightly moisturised but not greasy, clean but not dry. I'm also not sure if it makes my scalp get oilier faster than usual. I am confusion lol