It can be due to many reason baby have colic. Stomach upset, swallowing too much air when feeding, etc. It will happened at certain period of time and recurring process. It can lead to other health factor. You can consult doctor if you are really worried but you can try to see other remedies to soothe baby like turning lullaby, baby wearing, proper tummy massage, bicycle routine for leg, etc. Unfortunately, most babies do have colic at the early stage and I experience it myself for my first child. She cried past midnight till morning. We tried all methods till she is tired and fall asleep.
Meenu