"Return to work syndrome" after the holidays isn't a true medical diagnosis, but a normal reaction to returning to routine. Vincenzo Barretta, psychiatrist and scientific director of the Noesis Center in Naples, explains this. He believes that calling it a "syndrome" risks transforming a physiological and temporary discomfort into an illness.
https://www.youtube.com/watch?v=Dve6dyJ1Kpg
