Quoting thewarmth:" From the way they describe it on the site, yes it is. Can be 5 hours or more a day, yep, colic."
When a baby has colic, they are crying because they are in pain from the gas built up in their stomach. PURPLE crying, the baby is just crying, not in pain.
Quoting K. P. Walsh:" My daughter's pediatrician told me that he hasn't diagnosed colic in nearly 8 years because 9/10 it's ... [snip!] ... her to the pediatrician. Turns out, that's what it was. She was quite the crier for a long, long time. Again, just a thought?"
I've always assumed colic was a plethora of things, including acid reflux, that could be the suspect.