maybe separation anxiety?
my son has tt since he was 9mths old. Both me n my hubby have to be by his side watching tv etc. if either of us stands up to go toilet or kitchen he will wail! WAAAIIILLLL till u sit ur butt back next to him *faintz*
But @ 11mths he is better. I can leave him alone in the living area either on the mattress with ALL his toys or him standing at the coffee table. Either way the TV will be on to entertain him thou he dun watch the program (only interested when its advertisements).
As yeye say, its a passing phrase. Why dun u try not to carry him when ever he cries? Instead sit down with him, or hug him n reassure him tt u r there n he dun need to be afraid etc?