Have you noticed excessive hair loss, red, scaly areas or plaques on your scalp, excessive scalp psoriasis vs dandruff » , or soreness or irritation there? There is much more to this issue than just a simple skin condition! These are signs of psoriasis on the scalp. Here at Kayakalp Global, our professionals can. Your skin cells overproliferate as a result of a long-term (chronic) autoimmune illness called scalp psoriasis, which is brought on by your own immune system. It results in thick, discolored skin patches on your scalp and surrounding areas called plaques. These are a few instances of the regions where the patches could be visible, according to the doctors at Kayakalp Global.