Sudden vomiting in a two-and-a-half-year-old baby may be related to eating or crying while inhaling large amounts of air, digestive disorders or gastroenteritis, upper respiratory tract infections, brain diseases or certain surgical diseases. Parents are advised to take their babies to the hospital for detailed examination and treatment for the cause. Common causes: 1, too much air inhalation: occasional sudden vomiting phenomenon of the baby may be due to eating or crying when inhaling too much air to the stomach, the air upward migration resulting in sudden vomiting symptoms; 2, digestive disorders or gastroenteritis: two and a half-year-old baby digestive function is not fully developed, because of improper diet, abdominal cold, it is easy to cause digestive disorders, causing sudden vomiting phenomenon appears The baby can also be accompanied by abdominal distension, abdominal pain, diarrhea and other discomfort; gastroenteritis can be manifested as vomiting, followed by fever and diarrhea, should promptly go to the hospital to clarify the cause; 3, upper respiratory tract infection: baby due to cold, acute upper respiratory tract infection, the early symptoms of sudden vomiting, accompanied by low-grade fever, followed by coughing, runny nose sneezing, etc.; 4, brain disease: if the vomiting is jet. It is important to consider whether there is encephalitis and other lesions in the brain. In this case, it is necessary to seek medical attention in time to avoid aggravation of the condition; 5, other: some surgical disorders, such as intestinal obstruction, acute appendicitis, etc., vomiting symptoms are obvious, the baby’s mental state is depressed, accompanied by abdominal pain, etc., need to seek medical attention in time. Treatment: 1, if the phenomenon of occasional vomiting, you should pay attention to not feeding the baby within 2 hours after vomiting, to ensure that the intestines get rest. 2 hours later, you can feed the baby rice flour, rice soup or thin porridge in moderation, do not feed milk or other food, so as not to stimulate the intestines and stomach, resulting in vomiting again; 2, digestive disorders leading to vomiting, parents should give the baby oral under the guidance of the doctor Probiotics and spleen granules for conditioning, and can be used to gently massage the baby’s tummy in a clockwise direction to increase intestinal peristalsis and relieve the symptoms of discomfort; 3, upper respiratory tract infections in the treatment of the baby to anti-viral, can be fed to the baby under the guidance of the doctor Shuanghuanglian oral liquid, anti-viral oral liquid for treatment; 4, frequent vomiting or accompanied by abnormalities, timely access to the hospital. Note: 1, parents should pay attention to the baby vomiting after the timely feeding of some warm water to promote gastrointestinal digestion and absorption, to relieve stomach discomfort; 2, pay attention to timely increase and decrease the baby’s clothing to avoid abdominal cold; usually take the baby to the outdoor sun to help improve the body immunity.