<human>: Hello my 2 1/2 year old often has diarrhea. His poos go from dark and sticky to sand and grainy to watery with undigested food. Its not uncommun for him to go 10 to 12 times during the week-end. We had him tested for celiac disease and his results came back negatif. We also tried to cut all milk products thinking that maybe he was lactose intolerant and then again the mustard smelling loose stool keeps on coming back. He recently had a grow spurr and is now back in the 50 th percentile and he is struggling to stay in the 10th percentile for weight. he currently weighs 26 pounds. Could you please help us figure out what might be wrong with our son. Thank you kindly
<bot>: Hi... Thank you for consulting in Chat Doctor. I understand your concern. I have a few questions and will suggest few possibilities. Questions:1. What was the birth weight and what is the current weight?2. How is the attaining of developmental milestones?3. Is the stool oily and floats in the pan?4. Is there any color change in the hair or skin?5. Is there any history of recurrent serious infections? Possibilities:1. Chronic diarrhea - ? Fat malabsorption2. Micro Nutrient deficiency3. Immunodeficiency either primary or acquired. Hope my answer was helpful for you. I am happy to help any time. Further clarifications and consultations on Chat Doctor are welcome. If you do not have any clarifications, you can close the discussion and rate the answer. Wish your kid good health. Regards - 