This works!!!
Explanation first, then method!:
1.Apparently a young baby's stomach/gullet etc functions more like a wide necked bottle than the adult bag/valve/pipe shape (as it was described to me).
2.Bubbles of air which naturally get in when feeding can get trapped and cause wind/pain.
3.To avoid this let baby stay laying down for a few minutes after feed before slowly & gently tilting baby up- just keep her cradled in your arms after bf then raise in the crook of your arm - as you raise her the bubbles gurgle up and out without pain or disturbance:
the bubbles settle on surface of milk in stomach and float out -try it with a carafe of wine or a tall drinking glass - hold it at an angle after filling with lemonade or soapy water to see what I mean, I'm not very good at explaining things without my hands waving about!!
A midwife told me about this, and it really does help (unfortunately she told me after DS2 - DS1 had had horrid wind, wish I'd known earlier!!)
Apparently Britain is one of the few places in the world who routinely pat their babies on the back until they burp. I used to think everyone did it, I blame tv/films showing knackered parents walking around playing the living bongos on pretend babies!!
Hope this helps. I fed my DS1 exclusively laying down as I couldn't sit up at all due to a disabling illness.