7 months old baby suddenly vomit, mostly caused by improper feeding, mainly may be related to infectious diarrhea, gastrointestinal disorders, intestinal obstruction, etc., need to go to the hospital for relevant examination, clear cause and then symptomatic treatment, common causes and treatment methods, as follows: 1, gastrointestinal disorders: can be caused by cold or due to improper feeding, such as eating too much, too fast, eating smelly food or crying immediately after eating, etc., generally by changing the feeding method can improve the symptoms, if not relieved. Generally, the symptoms can be improved by changing the way of feeding, and if not relieved, it is necessary to consult a doctor; 2, infectious diarrhea: can be caused by bacterial or viral infections, such as dysentery, autumn diarrhea, etc., generally with diarrhea as the main manifestation, the infant also has cramps, which can be accompanied by symptoms of nausea and vomiting. Firstly, attention should be paid to timely rehydration to prevent water and electrolyte imbalance, which may lead to dehydration. Secondly, intestinal flora can be adjusted by using intestinal probiotics such as Bifidobacterium bifidum as prescribed by the doctor to promote recovery of gastrointestinal function; 3. Intestinal obstruction: mainly because the normal operation of intestinal contents is obstructed, thus leading to intestinal dysfunction, often caused by intestinal entrapment, intestinal atresia, peritonitis and other factors, abdominal pain, sudden vomiting, as well as anal stoppage of defecation, exhaustion and other symptoms can occur, requiring timely medical attention, incomplete Intestinal obstruction can be treated conservatively, under the doctor’s assessment, if necessary, surgery; 4, other diseases: such as the baby appears cranial trauma, intracranial infection and other abnormalities, can cause increased intracranial pressure, vomiting is its typical symptoms, need to review whether the baby has a history of cranial trauma and other brain abnormalities, timely medical examination, can use drugs to control cerebral edema, reduce intracranial pressure, combined with the specific cause to consider surgical treatment. Note that after a baby has a large mouth vomiting, it is recommended to identify the cause in a timely manner and not to use private remedies for treatment.