Gas seems to be one of the issues of a baby suffering from colic, but it's not the only issue a baby might face. In colic babies, the digestive system is still taking time to develop. There're other factors such as: - Imbalance of healthy bacteria in the digestive tract - Food allergies or intolerances - Overfeeding, underfeeding, or infrequent burping - An early form of childhood migraine - Family stress or anxiety Whereas a gassy baby shows the following symptoms: - Crying while passing gas or soon after - Arching the back - Lifting the legs - A swollen looking stomach - Passing gas or belching