Could indeed be seasonal, there have been studies and it's a registered disorder[0] called SAD (Seasonal Affective Disorder), usually it lasts up until spring/s

Could indeed be seasonal, there have been studies and it's a registered disorder[0] called SAD (Seasonal Affective Disorder), usually it lasts up until spring/summer. Light therapy might work as a non-drug cure. [0]https://www.nimh.nih.gov/health/topics/seasonal-affective-disorder/index.shtml https://www.nimh.nih.gov/health/topics/seasonal-affective-di...