I am feeling really upset because my son screams as soon as he sees my parents. And I mean really SCREAMS. He is absolutely fine with absolutely everyone else. It's just my parents. I wonder if he has bad association after being left with them? They looked after him when we went away for 2 nights but 3 days when he was 9 months old. The only problem with that as an answer is that he's been left with other people and has been absolutely fine. Perhaps it's because he was fairly young? He had been left before then but only for 1 night. I am finding it so difficult as it's obviously upsetting my parents too. Any explanation or advice would be most welcome.