blood in urine can mean a lot of things. please check if there is some trauma or injury
in the local area. if there is no trauma there. you'll need a urine examination done to rule out urine infection which is one of the most common cause of bloody urine. urine examination includes urine culture & sensitivity as well. please drink plenty of water. if it doesnt clear in a day, need to see doctor to evaluate for other causes. you will need to get admitted for the same as well.