I have a similar situation on my index fingers and thumbs but with blisters (small and large) breaking out at the knuckles… do you have this symptom as well? I have celiac and know that i was getting glutened post hurricane Ian when I was displaced from my home for close to 8 months. I found a functional Dr who prescribed Naltrexone which has helped significantly. Unsure still tho if it was psoriasis, gluten poisoning or … ?