<s>[INST] Hello my daughter is going to be 3 months on may 16. She has like a mucousy blood in her stool. We changed the formula per doctors orders stating that it might be due to the milk/ or breakdown of the formula. It seemed to work for a week but the blood just came back tonight. Do you know any other things that may be causing this. The doctor also sent 3 labs of the stool with blood 1 of those to attempt to grow bacteria and nothing came back in the results other than blood in the stool. What are your thoughts [/INST] Hi thank you for asking question on ChatDoctoras from your history if baby is not having any fever taking orally well and stool results not showing any bacteria infection as a cause ruled out. Another possibility is vitamin K deficiency can be checked by doing blood test, and it is common in baby who is on formula feed. Another possibility is if baby is having constipation straining can cause blood in stool. Another possibility is problem in platelet which is important for normal clotting of blood can give rise to blood in stool sometimes. This problem also can be detected by doing blood test like CBC (complete blood count).so from my perspective should rule out above-mentioned disease. Thank you. </s>