I just watched a very entertaining youtube video from a guy named Mihangel, (Welsh for Michael) His Youtube handle is NaboorusNikNaks and he does a video cast all about herbalism, with a hippy flair.
The video is here - LuLu Tea. While the production quality is low, I thought the tea sounded delicious and soothing. Here is the recipe, written out by me.
1 part dried peppermint
1 part dried chamomile
1 part dried lemon balm
1 part dried fennel
Mix together in a bottle about four teaspoons of each herb to make a batch.
To brew allow a teaspoon per cup of tea and brew in almost boiling water for 3 to 20 minutes depending on how strong a taste you like.
He claims that this is very soothing to his fiancee's Crohn's.