dd is two..despite a very varied diet, is getting constipated reguarly. she'll not go but clearly need to for a day or two, then we spend around 2-3 hrs of horrific sobbing..wondering around not knowing what to do with herself, in agony trying to push a solid, horid smelling poo. Her bum is red raw and it will be half in half out for hours. She's spread across my lap practically reinacting birth right now...its sp horrible for her..how do I stop this?