What should I do if my baby is 3 months old and has cold and diarrhea

3 months baby cold diarrhea, can take the baby to the hospital to do a blood routine, stool routine examination. If it is caused by cold, can take montmorillonite powder, relieve diarrhea symptoms, at the same time with the use of probiotics, conditioning intestinal flora. In addition, give the baby drink some warm water.