> but some dandruff can be caused by seborrheic dermatitis, fungus, psoriasis, and so on.

If you're like me and find yourself with dandruff from something like what this person mentioned try this stuff. You will literally see results after your first use, mine was completely cleared up after about 3 weeks of use. FYI it smells fucking terrible.

For coal tar, 5% is the strongest you'll be able to get in the US, I believe. E.g. Psoriatrax (bottle says 25%, but it's equivalent to 5% coal tar) or Alphosyl.

You can get 10% salicylic acid peels on Amazon. Whether this is appropriate for the scalp, I don't know. 10% is pretty strong.

Salicylic acid is pretty drying, too. Have you considered urea? It's more effective than salicylic acid, and is actually moisturizing. You can get lotions with 10-20% urea, e.g. Excipial (10%) or Stratus (20%). (In my experience there's not much difference between 10% and 20%, and there's no real reason to go as high as 40%, which are typically used on foot callouses.)

This is the only stuff that keeps my scalp free from flakes. This really does work. Not a cure, but I use it and swear by it. If I stop using it for more than 2 days, it comes back. This shampoo keeps it at bay.

https://www.amazon.com/Psoriasis-Shampoo-Psoriatrax-Solution-Bottles/dp/B002KAA8KK

Maybe they are talking about Fluocinonide? I use this stuff, however, it is unavailable right now.

https://www.amazon.com/gp/product/B002KAA8KK/ref=ppx_yo_dt_b_asin_title_o00_s00?ie=UTF8&psc=1

This totally keeps my scalp flairs down and almost gone. I stop using it and 2 days later, wham....back at it. If you like the smell of fresh asphalt, then this is great stuff. The smell goes away in about 10 mins.

Psoriatrax 5% Coal Tar Psoriasis Shampoo 12oz

I've never looked back. I was never that big a meat eater. I liked my pepperoni pizzas, but I was never into those meat-heavy things like steaks, so switching to a strict vegetarian diet was mostly a matter of figuring out what new things I would have to eat to vary my diet accordingly. Good thing tofu and veggies are delicious. Fortunately, the world is also much more vegetarian-friendly than it used to be just a few years ago, when vegetarians and vegans often would be made to feel like outcasts and weirdos.

On this diet, I generally feel healthier and fitter. I lost weight, but gained muscle. I used to come down with a cold 2-3 times a year, each lasting a week or so, and I've genuinely not had a cold since I went vegetarian. I eat plenty of grains, by the way, but I try to stay away from heavily processed stuff. I stick to home-made granola, high-quality muesli, artisan breads, that sort of thing.

One specific dietary thing is to avoid emulsifiers. Turns out modern industrial emulsifiers and stabilizers are terrible for the human digestive system, and can play a significant role in inflammation. Emulsifiers/stabilizers are chemicals (not always "bad" chemicals) that are designed to keep different ingredients together in things like salad dressings, but they show up in some surprising places, like ice cream. You can read more here.

Regarding alcohol, maybe try having him quit for a few weeks and so how that works? In the long run, I think it's probably fine, especially moderate intake, and not everyone has a problem with alcohol excarbating their psoriasis. But right now it's important that he attack this with every tool at his disposal. (Non-alcoholic beers are surprisingly decent these days, by the way!)

Best of luck with the rheumatologist and Humira.

> I'll also tell him about the Psoriatrix

*Psoriatrax. This one. I think I've seen it in pharmacies, not just on Amazon. I see it on the Walmart web site, but not on the Walgreens or CVS web sites.

I genuinely don't how scripts work for OTC stuff when you want a specific product. I think that your doctor can prescribe a specific product, and then your pharmacy can let you replace with something else, as long as it's an "equivalent" product.

Psoriatrax is 5% coal tar. That's is the actual dosage. Bottles will typically give two numbers. Psoriatrax says it's "25% coal tar solution, equivalent to coal tar 5%". The 25% is the solubilized form that itself is equivalent to 5% actual coal tar.

All of that said, while Psoriatrax is stronger than T/Gel, I'm not sure if you'll see a big difference.

I've had good luck with Psoriatrax purchased from Amazon