<s>[INST] My baby is currently in his 9 month and cried complete night ...i guess it was due to stomach ache..may be food did not get digested. However morning he had a free motion after which he got relief ...in these cases ..how can we identify the problem and what medicines needs to used. baby Weight :8.25 kgs Age: 8months medical history - none , general medication is in process. [/INST] Hi...Thank you for consulting in Health Care magic.This is called evening colic and is quite common in this age group. This happens when the baby consumes food very fast and in eagerness to drink  milk or eat will gulp in air too. Unless the air comes out like burping or flatus this discomfort will be there and next time check if the baby is sucking too fast and gulping in air too. You will be more convinced. Usually I don't advice any medicines for this as they give only temporary relief.The two best ways to relieve this distress is -1. Do not put the baby in lying position after feeding till the baby burps out the swallowed air.2. If still crying - put the baby in prone position and keep patting the back gently so that the baby passes off the flatus and gets relieved.Regards - Dr. Sumanth </s>