Vomiting and Bowel Movement

Can breast milk be the cause of diarrhoea and vomiting in some babies

This is not true. Breast milk is the safest option. Some exclusively breastfed babies pass frequent watery motions - at times green or with mucus. Some of them vomit curds or milk off and on. This is no cause for concern if they are active and pass urine frequently. No treatment is required and breastfeeding should be continued. Sometimes normally thriving breastfed babies pass a motion as infrequently as once every three or five days. This does not mean that the baby is constipated unless the stool is hard (which is unlikely in an exclusively breastfed baby).

Do green motions mean that the baby is not getting enough milk

No, that is another myth. Again, the number of times the baby passes urine is an indicator of his good health or otherwise. If the baby is active and passes urine normally, the green motions are normal. The so called 'starvation stools' are seen in an emaciated starved child who passes traces of green mucus in place of stools.