Nostalgia is not strictly medical although it was coined a term of a condition of melancholy but in more recent years studies show that it may be a more important part of wellbeing than we thought.
Links:
Nostalgia as a disease: https://www.sciencedirect.com/science/article/abs/pii/S2352250X22002573
Clay Routledge: https://www.clayroutledge.com/
Nostalgia and wellbeing: https://pubmed.ncbi.nlm.nih.gov/36669249/
Man’s Search For Meaning: https://www.goodreads.com/book/show/4069.Man_s_Search_for_Meaning
The past makes the present meaningful: https://pubmed.ncbi.nlm.nih.gov/21787094/
Music and nostalgia: https://www.southampton.ac.uk/~crsi/Sedikides,
My own nostalgia tips: music, photos, places, journalling and rituals.
","author_name":"Dr Ayan Panja"}