Question: what to do when newborn baby hiccups?
Answer: Take a break and burp. Taking a break from a feeding to burp your baby may help get rid of the hiccups, since burping can get rid of excess gas that may be causing the hiccups. ... 
Use a pacifier. Infant hiccups don't always start from a feeding. ... 
Let them stop on their own. ... 
Try gripe water.