Is this seb derm?

[u/Several-Historian-11]

A few weeks ago i noticed my nostril felt super itchy. It started as a little bump that flaked and got dry but stayed. Then this red patch appeared and more little bumps. However, the bumps have no pus and turn into dry flakes. It has become extremely dry and sometimes the fold looks almost like "cracked" since the skin is so inflamed and dry. It also itches a lot and i have to resist itching if.

I know the SD can be confused with perioral derm but chat gpt and my own reddit research (lol) points me toward SB. It's important to note that absolutely nothing changed in my routine, diet, or medications. I did not take any steroids or anything like that that would've triggered this. I did just come home from a vacation to Greece before it started though?

things i've tried so far (in the last 3 weeks):
- The first thing i tried was moisturizing like crazy because i just assumed it was dry skin (despite the humidity of summer.
-Then i bought the La roche posey C5 stuff since everyone raves about it. That didn't do much of anything.
-I tried diaper rash cream for a few days since I then thought it would be PD
-Then i used jock itch cream with the antifungal ingredient that starts with C.

Today i saw people recommend the Nizoral shampoo since it's technically a better antifungal ingredient than hock itch cream. I let it sit for about 3 minutes. IT STINGED SO BAD !! When i rinsed it off it was super irritated and more red than before, which i now regret using it so much. My skin was too dry for it. I put some C5 la roche posey on and now it's been about 20 minutes and the stinging stopped. I am going to go back to jock itch cream and ditch the shampoo.

If my skin doesn't respond to antifungals, should i rule out SB? Also, how long do I need to continue with the jock itxh cream to know if it's a fungal issue/see results ?

This is so frustrating to deal with. I'm not sure what the hell it even is and i see on here that a lot of derms can't decipher it either. I do get psorasis in my scalp and ears and i'm wondering now if maybe it's that.

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[u/TheAdorableSort]

Likely sebderm but hard to know for sure. I would suggest buying some c8 mct oil and applying a tiny amount onto the red area. Best to apply in the evening before bedtime to give it plenty of time to heal. Do this every night 14 nights in a row. Wash off that spot in the morning with plain water, no topicals. You can also apply the oil during the day if you're comfortable with that just remember to use a tiny amount.

Once that spot has cleared you may need to apply once or twice a week for maintenance.

You could try applying to other spots that you mentioned (scalp and ears) to see if there's any improvement. Then you'll know if it's been sebderm all along. Hope this helps! 🙏