My DS (3.6) has been completely continent in the day for nearly 18 months. In the past few days, he has been wetting himself again. Today we have had to change him 4 times. He is upset when he realises but says he does not know why he is doing it. My DD (5.3) did not have this problem and we are a bit puzzled. DS is not unwell, is eating and drinking normally, is not constipated and has not had any change in his routine. His urine looks and smells completely normal (probably too much info, I know, but I do not think this is infection) I have no intention of reverting to nappies as this is a regression and will cause him to lose confidence (and continence!!) Any constructive advice would be appreciated