Baby vomiting and diarrhea, convulsions are often due to acute gastroenteritis, but can also be seen in hypocalcemia, hypocarbia, need to go to the hospital in a timely manner, relevant examinations, clear cause of the treatment.1, acute gastroenteritis: eating unclean food, overeating, food allergies and medications, etc., can lead to the baby’s occurrence of acute gastroenteritis, if accompanied by dehydration and fever phenomenon, then it may occur. Vomiting and diarrhea, convulsions. Children should be hospitalized promptly. If vomiting persists or dehydration is evident, intravenous glucose saline and other relevant electrolytes are required. Apply antidiarrheal and probiotic drugs for treatment as prescribed by the doctor. 2. Hypocalcemia: frequent vomiting and diarrhea caused by acute gastroenteritis can lead to a large amount of calcium ions being lost through the digestive tract, resulting in hypocalcemia, which can lead to twitching of the limbs of the child. In addition to treating acute gastroenteritis, calcium supplements, such as calcium carbonate granules, can be taken under medical supervision. At the same time should eat more calcium-containing foods, such as milk, eggs, etc., more sunshine, to promote calcium absorption; 3, low carbon dioxide anemia: acute gastroenteritis caused by frequent vomiting, diarrhea and other symptoms caused by the child crying, may also lead to excessive carbon dioxide exhalation, the body’s partial pressure of carbon dioxide is too low, so that the emergence of low carbon dioxide hemorrhagic, resulting in the child’s convulsions. In this case, we should go to the hospital in time, use the mask, invasive mechanical ventilation and non-invasive mechanical ventilation for oxygen therapy, can also use the hyperbaric oxygen chamber for treatment. Drugs to relieve bronchospasm should be used as prescribed.