Spitting up without passing stool is not consistent with rotavirus enteritis and may be caused by congenital pyloric stenosis or intestinal obstruction. Rotavirus enteritis is the most common disease in infants in fall and winter, manifested by frequent stools, watery, yellow watery or egg-like stools with a small amount of mucus and no fishy odor. Congenital pyloric stenosis is an incomplete obstruction of the upper gastrointestinal tract caused by narrowing of the pyloric lumen, manifested by projectile vomiting without bile, gastric peristaltic waves, and a mass in the right upper abdomen. Intestinal obstruction is an obstruction to the passage of intestinal contents. It manifests as abdominal pain, vomiting, abdominal distension, and cessation of defecation. If you find that your child is only vomiting but not pooping, you should go to the hospital in time to clarify the cause of the disease and get timely treatment under the guidance of the doctor.