14 Jun I have a similar problem as well, except wen i pee at the end of my pee it gives me a severe burning sensation and thats wen i produse the thick grean yellow and red mucus stuff. My mom wont take me to the doctor so i wanna know if its bad so i can show here. i really need help its been like this for about 2. Causes of blood in urine. Blood in your urine could come from anywhere in the urinary tract – the bladder, kidneys or urethra (the tube that carries pee out of the body). If you have other symptoms, this might give you an idea of the cause. Don't self-diagnose – see a GP if you think it's blood in your urine. 9 May What Does Your Pee Mean? Causes of bloody urine include trauma, kidney disease or cancer, inflammation or an infection in the kidneys, and more. Bacteria that causes a urinary tract infection (UTI) can also produce a foul smell.