My son is 3mo. 3 weeks old, he is exclusively breast-fed. For about a week and a half he has been stooling brownish tan with black mucousy specks in it. He has had a little bit of mucous in his nose and coughing too. No fever and he is squealing with delight in the background as I write so I can see no other signs of illness.
Hi... Thank you for consulting in Chat Doctor. What your kid is having is not a diarrhea and is only a gastronomic reflux. It is quite common for babies of this age group to pass small amount of diarrhea or loose stools soon after feeds. This need not be treated as diarrhea and especially antibiotics are not indicated. When the baby takes milk, the stomach expands - then when it is contracting it sets off a wave form which moves down the intestines and when that wave reaches the lower down rectum, a small quantity of the stool is evacuated out. This is the basis for gastronomic reflex. Do not worry. Unless the kids having low urine output or very dull or excessively sleepy or blood in motion or green bilious vomiting...you need not worry. 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.