Psoriasis Medicated Scalp Treatment

which treatment works best for psoriasis of the scalp (spelling may be incorrect, is a skin condition).?

I have my son as an adult after serving in the U.S. Army. He thought the red, scaly patches on his scalp was wearing a kevlar helmet for most of six years. He is a civilian, but its worse than ever. We have tried medicated shampoo, lemon juice, oil, coal some things from the pharmacy. It looks really horrible if you have short hair. No more military courts for him! Thank you.

Not sure if you have it in the U.S. – But the use Neutrogena T-Gel, has shampoo and conditioner and is the only product that can easily buy in stores. It is a product based on coal tar, but it doesn't smell as bad as other tar products coal.

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