It was a slow process but a consistent one.
I used to have around 5-6 pain periods a year, each would last for around a month more or less, with 2 attacks a day.
I had that my whole life.
Now i only get 1-2 periods a year and they last only up to 3 weeks.
The period of the attacks themselves changed too.
It used to be around an hour, now it's around the 30 mins.