Psoriasis in children.. Congenital psoriasis. Spots on the scalp infect the skin sites especially the limbs and trunk Psoriasis in children: Very common in children, although congenital psoriasis is very rare. The disease first appears on the scalp where the lesions appear late patches to infect different skin sites, mainly the limbs and trunk. Share This: Facebook Twitter Google+ Stumble Digg Email ThisBlogThis!Share to XShare to Facebook