Don’t worry it usually resolves on it’s own. Although it’s really upsetting to see little babies hiccuping in their sleep sometimes! This article has some good info on baby hiccups: https://sg.theasianparent.com/normal-newborn-babies-hiccup
i let my baby stop herself by distracting her. below 6 months is risky to give water.
Normally i will give my baby something to drink yo stop it 😊
Give baby some warm milk or water.