DS(4) goes to the toilet a lot, several times in one hour sometimes.This has been going on for a few months now and I don't know if its physical or psychological. He started school last Sept and seems to have settled OK. Had a tearful, clingy phase about Nov but goes in Ok now. Still says he prefers being at home tho. They mentioned the toilet thing at school and I took him to the drs with a water sample. He didnt think there was anything physical as no other symptoms and promised to get sample checked and get back to me if anything was found. Didnt hear anything so assume all ok. He's not quite as bad now but has started to ask before we go anywhere if there'll be toilets there. I always ask if he wants to go before we leave the house then 10 mins later he says he wants to go again. Often we're in car and I'll tell him to wait til we stop, then he doesn't mention it again. When he goes its often just a few drops. He used to be fine and toilet trained no problem. He isnt drinking any more than usual. Now he says he doesn't want to go on holiday in the summer (is a long drive) as he'll need the toilet in the car. What's going on?