For Red Patches
or Psoriasis

When your scalp is more irritated, red and flaking from psoriasis, you may need a topical treatment like this one from Aesop. It's a tad pricey and requires you to apply it before getting into the shower, but because it sits directly on the skin for 15 minutes, it seeps in and really works fast. Testers reported a noticeable reduction in flaking, shedding and irritation within a few days. This is also good for guys who don't want to constantly shampoo. Just rinse it out with water in the shower.

Sage & Cedar Scalp Treatment,
$33 by Aesop