Hi, my 3 year old boy just wee d a little in his pants and there looks to be some white powder on his underwear? He only urinated twice yesterday and his first piddle wasn t until after 3 in the afternoon. He is drinking although not very much. He isn t complaining of pain, although a few days ago he said he was a little sore whilst piddling, however only one time. He is eating fine. Thanks in advance.