My nine year old son has had blood in his poo since this afternoon, he is not constipated as far as I know (poo has been quite loose), he has been four times since getting home from school. The last two times have been almost entirely blood/possible mucous rather than mixed in with poo and the tissue has been pinky/red when he wipes. He was complaining of tummy pain which has now subsided. Any ideas? Is this a 111 case or call the gp on Monday? Thank you!