It may be caused by urinary tract infection, or enteritis, indigestion and other factors, usually pay attention to let the baby drink more water, two to three hours to eat milk, not too often, easy to indigestion, to give the baby good local hygiene, after the bowel movement with warm water to wash, to prevent the phenomenon of infection. Pay attention to the warmth not to get cold, observe for two days, has been this situation, need to go to the hospital to laboratory stool routine, urine routine examination, if it is an infection, need to take drugs for treatment.