Child saying there wet when dry

[Find23334556]

For the past week my four year old son has been complaining of being wet and having wet trousers after going for a wee, after checking him over he’s completely dry. He’s done this four times this evening and keeps changing his trousers for new ones -also gets really distressed. Im not really sure what’s going on, anyone have any suggestion’s please? He’s been toilet trained since age 2.

Not sure on that one sorry @Find23334556. Has he started school recently? I just wonder if someone has had wee'd at school in their trousers and it's made an impression on him? The one other thing I can think of is that he may be feeling a little poorly and is having trouble recognising when he's wet or fry?