My 2 year old daughter has had really light green/ white poo with blood going thought it what could be the cause? thanks.

Most commonly: An anal fissure, however bloody stool should always be evaluated by your physician . Light colored stools can be from too much of one food like milk or more serious reasons, especially if jaundiced or has belly pain. Assess her overall condition to see how urgent she looks. But a visit with your doctor is in order. Hope this helps.