Why is DS suddenly very sicky? (reflux?)

[highlander]

DS is 5 mo and has never been a sicky baby. However, in the last month he has suddenly become very sicky. Some days we change clothes 2-3 times. He doesn't do the classic massive upchuck after booby but often throws up cottage cheese stuff between feeds. Encouraging him to have boob more often, but less seems to help slightly. It doesn't happen every day, on average every 48 hours.

This only happens during the day - he's never been sick at night, despite taking on a massive amount of boob just before bed.

Is this related to him being more mobile and trying to roll over etc, but his sphincter is still very loose? Is it 6 mo it tightens up?

I would say it has to do with him moving around more. Does he roll much? Does he sit up yet? Do you prop him up? All these things would make him more inclined to posset. I take it he isn't starting solids yet?

Coudl be a combination. If he had a slight hidden reflux (which would not have necessarily worried him) then that would be accentuated by his increased mobility. Wouldn't worry overly as it sounds pretty infrequent.