DD is 14 and drinks barely anything (maybe 250ml a day - at most). However, she ALWAYS needs to pee. Every 30-60 minutes she goes to the toilet. Says its dark yellowish. If she drinks more, she goes every 10 minutes or so. Its ridiculous. At school she keeps saying she almost wets herself (aren't allowed to go in lessons) and its stopping her from going out anywhere. Its distressing her too. She doesn't get thirsty at all, not even after exercise. Any ideas as to what it is? Have an appt for Friday