Hello, this is Res.1. Sorry, I can’t type this in Japanese.
I don’t know how to say colic in Japanese ( I used English books for all the baby informations).
Have a look at this site. Read it throughly, then it should help you understand what it is.
http://hcd2.bupa.co.uk/fact_sheets/Mosby_factsheets/infant_colic.html
There are several definitions for "COLIC" but my sons’ was"gassy" one, so whenever I brest fed him, he was struggling for an hour or so with gas in his tummy, and when he finally settled down, it was another time for feeding! AND he had to be fed every one to two hours through out the day, so it was VERY stressful time.
I tried gripe water and the other kind of "degassing" medications, but they didn’t work for him.
Good luck, it’s not going to last forever....