Can you please tell me how a child behaves when they have colic?

Can you please tell me how a child behaves when they have colic? My little one is generally calm, crying only when he wants to sleep and eat. But when he cries, his mother-in-law says he has stomach pain, so he cries. I don't know, there seems to be gas, stool is normal, the belly is soft ??‍♀️