Not all babies develop colic. You will know if your baby has it around 4-6weeks. Baby will cry so intensely and nothing can soothe her. Actually people are still not sure what exactly causes colic but they think it might be cause by indigestion, wind, sensitive to substance in the FM/BM and smoking mothers. My baby has colic when she was around 6 weeks and it was really a nightmare. I brought her to the PD and PD prescribed probiotics and ridwind for her. PD also taught me a different method to burp the baby. I kept researching on colic myself too. I did bicycle exercise, massage and aeroplane carry my baby. My baby finally stop all her crying episodes at around week 12.
Wan Simin Cecelia