Colic is not some strange disease that you should worry about. As a matter of fact, it is really rather common especially to infants who are barely a year old. Still, the constant screaming and fidgeting can worry many parents, specially if this is the first time that they have came across such a problem. After all constant crying could be the result of a lot of things not just a colic.
This is the reason why it's crucial for parents to understand just what colic is and to recognize its signs and symptoms.