Spitting up in 6-month-old babies may be a normal physiological phenomenon, indigestion or acute gastroenteritis, etc. It can be improved by general treatment and medication. 1. physiological phenomenon: the baby’s stomach is a relatively straight state, if the milk after eating milk did not timely burp out, it is easy to gastroesophageal reflux and thus cause spitting up, it is recommended to hold the baby upright after each feeding, one hand gently pat the baby’s back. 2. indigestion: due to the baby’s age, the gastrointestinal function is not yet fully developed, resulting in baby indigestion, clinically under the guidance of a professional doctor oral bifidobacteria, lactobacillus and other probiotics for treatment. 3. Acute gastroenteritis: due to the baby’s poor resistance, it is likely to be infected by bacteria and other infections, which in turn triggered acute gastroenteritis, can be under the guidance of a professional doctor oral bifidobacteria triple live bacterial capsule, montelukast, cephalexin and other drugs for treatment. There are many other reasons why a 6-month-old baby may spit up, so it is recommended that you go to the hospital in time to get a clear picture of the cause of the illness and then standardize your treatment under the guidance of a professional doctor.