If a seven-month-old baby spits up milk, it is usually caused by symptoms in the stomach. First of all, you should pay attention to the diet, do not let your baby drink too much milk at one time, otherwise it is likely to cause the milk in the stomach to reflux into the esophagus and spit out, you can take a small amount of multiple feedings to regulate the spitting up, and to strictly control the amount of milk each time, you can use a timer to set a fixed time when drinking milk, the amount of milk will be more even. If vomiting is frequent, you should also consider whether it is caused by inflammation of the stomach. You can first use drugs to protect the gastric mucosa and inhibit stomach acid to relieve these symptoms.