The first thing you can do with vomiting in a 5 year old is to take oral rehydration salts. This is because vomiting in children leads to dehydration and electrolyte disturbances, especially low potassium. Oral rehydration salts can contain potassium, which can rehydrate and adjust the electrolyte disorder, thus achieving good symptomatic support treatment. Second, treatment of the cause. If the child’s vomiting is caused by indigestion, he or she needs to be treated with Chinese medicine that eliminates food and leads to stagnation, and the commonly used drugs include Wang’s Bao Chi Wan, Bao He Wan and Shen Qu Oral Liquid. If the vomiting is caused by acute gastroenteritis, routine blood tests can be performed, and cephalosporin anti-infection treatment can be applied if the white blood cells are high. Again, antiemetic drugs, such as morpholine, can be applied.