I read a theory (many years back) that it comes and goes in roughly 7 year cycles but i think thats utter bollox. There are definitely periods of my life when it hasn't bothered me at all, contrasted by periods where its totally dominated my life. How you rationalise the variability so precisely, i have no idea. My mum is nearly 70...she's had it all her life. You could always move somewhere with less seasonal extremes :)
I read a theory (many years back) that it comes and goes in roughly 7 year cycles but i think thats utter bollox. There are definitely periods of my life when it hasn't bothered me at all, contrasted by periods where its totally dominated my life. How you rationalise the variability so precisely, i have no idea. My mum is nearly 70...she's had it all her life. You could always move somewhere with less seasonal extremes :)