It's like Shandra says: I don't have scales on my face, my arms and legs. Only on trunk, neck and scalp. So I'm lucky to have this mild form of ich. The unlucky thing is doctors don't know much about it, because it's a rare form. They think it's recessive, but they aren't 100% sure because they don't know the gene that causes the disturbtion.
Shandra and Gryphon, thanks for the information. I really appriciate it.