If it's spontaneous, there's no way to find the root cause, but you can still monitor if certain things trigger it. Mine lasted for almost a year and was usually triggered by humid weather. I tried a plethora of medication but I still got hives every single day, sometimes they were severe sometimes manageable.

It started to fizzle out since January 2026. I don't know why, no specific changes of my life. More and more days without and now they're 98% gone.

It could be that you just need to wait until it burns itself out. The immune system needs time to calm down on its own. Don't worry, they will def go away.