We probably got into the habit of carrying him when he asked, then realised what we were doing. Now he cries really hard when we wait with him at top of the stairs with our hand held out.
He seems fine eventually, when down at the bottom.
What I can't work out is whether he's just reacting because we've stopped doing something he wanted (carrying him) or whether there's a problem.
Should I go to the doctor? I don't know if I'd know if he was in pain 