My baby is 2 weeks old and cries a lot sudden, his grandma think it's because of tummy as he get pain in tummy and have they have started to give him drops of Liquorice extract water on a room temperature (which IMO is strange), how to know what is going on with my baby? As I hate grandma experiments on her.
Babies cry when they 1) are hungry, 2) need a new diaper, 3) are sick, 4) feel like crying.
If the three first conditions have been checked, your baby is "just crying". It happens a lot. No worries. It's been encoded in our genes, it's a retrieval signal sent from baby to mother when mother left the baby alone in the old savannah to fetch some food.