Over the years I have seen dozens of posts where people have seen their symptoms attenuated when going on a vacation. I myself have noticed the same after a weekend at the beach. I have assumed it was the lack of stress or perhaps the myriad benefits of sunlight.
Here is a video making a good case that something else may have been involved. Mostly anecdotal but there is some science here too.https://youtu.be/44ddtr0xdvu