For scalp psoriasis, I currently use 6 drops tea tree oil, 1 tbsp aloe vera gel, and 1/2 tbsp coconut oil. I apply it to my scalp and leave it on overnight. In the morning, I wash it out and shower. This helps relieve the itching for a while. I have to do it every night, though. I hear shampoos can flare it up. I've been using a cleansing conditioner. Are there good shampoos for psoriasis that won't fade my hair color? Regular dandruff shampoos will fade my color with their sulfates and parabens, and they could also irritate my scalp.