Hi, I'm afraid I don't have any answers but wanted to let you know you're not alone! My 5 yr old boy has this problem too - he used to hold onto his poos for 3 days, then gradually increased to 4,5,6 days. This happened despite him eating masses of fruit and drinking plenty. He now has "Movicol" on prescription which means he can't hold on, but the result is he does lots of poos in his pants instead. Strangely, he has always insisted he didn't have tummy ache, even when he hadn't been for days. He just seems to instinctively try to hold on when the urge comes - after the doctor talked to him he said he'd try to go as soon as he needed to, but he doesn't
. Doctor said it's very common in young children and will hopefully resolve itself... but in the meantime there is a lot of washing!
He's on a very low amount of Movicol each day, dissolved in a drink at bedtime, and it just stops him from causing himself a bigger problem with large poos and more difficulty passing. I take lots of spare pants and wipes and plastic bags out with us (no good for my aim to be greener..)
If anyone else has any experience / ideas I'd also be grateful for them!