DS (2) has always had problems pooing, on and off throughout his life, but recently his constipation has got to ridiculous levels. He spends half his waking time straining or getting incredibly upset about a poo coming, and only usually produces anything about once every 3 days. I'm giving him lactulose at the moment, which seems to help bring on the poo, but doesn't seem to have any effect on the levels of distress he experiences. Has anybody else had any experience of this. Could it be something more than just constipation?