It is very interesting to hear from someone with the same condition.

Besides various other things I tried a therapy where they drew some blood and immediately injected it back, so my body "would learn not to react to itself". It did not help however.

It started when i was like 13. But it also started to get lesser and lesser when i turned 20, i think. I am 27 now and it rarely flames up anymore, i really hope it works out for you and will subside with time!