Tired I expect. For years I believe it was because you needed a poo ( another lie my mum told me as a kid, much like hillsheep, I asked on here to prove a point to IggyB that they were real only to be have my illusions shattered), Too many stimulants, like caffeine, or some sort of irritation can cause it too. if you wash your eyeout and its still happening you probably need a good old kip
Hopkirk - I work part time during the day but for the past 10 days or so i keep dreaming, every night, the weirdest of dreams I wished they would stopped! Going to have a nice bubble bath and hot choc tonight to see if that helps!