The causes of crying while feeding infants mainly include sleepiness, intestinal spasm and intestinal flatulence, as follows: 1. Sleepiness: if the infant is about to fall asleep, this time there will often be crying while feeding, which is caused by the irritable state of the very sleepy situation; 2. Intestinal spasm: if there is intestinal spasm, it will also cause crying while feeding, especially when feeding, it will reflexively cause intestinal peristalsis to speed up, thus causing intestinal spasm to be more obvious, which can be relieved by applying dinggui navel patch to the infant; 3. Intestinal flatulence: if there is obvious intestinal flatulence, there will also be crying while feeding, which can be regulated by timely application of probiotics such as mommy’s love.