Newborns enteritis blood in the stool specific days can not be sure, may be a few days, may be ten days or dozens of days, depending on the severity of the disease and treatment. If the condition of neonatal enteritis is relatively mild, timely cooperation with the doctor to take treatment, the time of blood in the stool is relatively short, usually about 7 days will return to normal, and enteritis condition can also be recovered. But some newborns enteritis is more serious, intestinal mucosa serious damage or even ulceration, the condition will be slower to recover, the blood in the stool will also be longer, may need more than ten days or dozens of days to be able to return to normal. Neonatal enteritis blood in stool must actively cooperate with the doctor to take treatment to avoid aggravation of the condition.