Acute gastroenteritis in babies usually gets better in 3-7 days, or even heals, but there are individual differences depending on the severity of the condition, which needs to be analyzed on a case-by-case basis. Acute gastroenteritis in young children is mostly caused by improper diet, cold and infections, among which infectious factors include bacterial and viral infections. If the child is in good condition and not combined with other diseases, bacterial gastroenteritis can generally be cured in about 3-5 days after the cause is clearly identified and actively treated after the completion of relevant examinations. Viral gastroenteritis is relatively difficult to treat, but can generally be recovered in about 1 week. However, if the child is sicker and has other underlying diseases, the treatment will be more difficult and the recovery time can even be extended to 2 weeks or even longer. Once a baby has acute gastroenteritis, it is recommended that he or she be seen by a pediatric gastroenterologist in a timely manner to avoid delayed treatment or improper treatment that could cause damage to the baby’s heart muscle and other organs.