I am currently writing a paper and in one of the sections it would be appropriate to write a quick digression to explain one topic in more detail. My structure would be something like
Section X (H1) [some normal text] Digression: Bla in detail (H2) [text of digression] [continue with text from Section X]
But that way, there is no clear part for the reader to see that the digression is over.
So how do I structurally return from a digression to continue with the initial topic? How are digressions usually structured and set apart from the rest of the section in conference/thesis papers?
(Is it even good practice to have digressions?)