<font color="#5E5A80">rains,
but my family doc told me the reason to cause BB keep vomittin is coz the end of the stomach or the intestine is narrow. and if the vomittin is too bad or serious, might need to hve a surgery to open it up. for this case. BB usually throw out like a merlion most of the time.
another reason is,
aft each feed, the stomach is full wif wind. so whn we burp our BBs, they will tend to throw out lil bit.
one more reason,
aft the feed, the stomach muscle contracts. so the BB will throw out lor...</font>