For many new parents, the most stressful time is when their baby won't stop crying. Often they're not sure if something is really wrong, or if their baby is just being fussy.

     Dr. Mark Scott, an emergency medicine physician, teaches new doctors what to look for in crying babies. He shares his tips, explaining that crying does have a purpose, what is colic,  how to know when to seek medical help, what the "rule of three's" means, and what emergency doctors will ask the parents.