The average weight for a little girl of 27 months is 12kg, so your granddaughter's weight of 9kg means that she is seriously underweight for her age.It is difficult to be sure about the cause of her vomiting without being able to see her, but she may have severe stomach to oesophagus reflux, known as gastro-oesophageal reflux.There are several other causes of vomiting in this age group that need to be excluded as well. I am concerned about your little granddaughter. She really needs to be seen by a paediatrician as soon as this can be arranged.
The information provided does not constitute a diagnosis of your condition. You should consult a medical practitioner or other appropriate health care professional for a physical exmanication, diagnosis and formal
advice. Health24 and the expert accept no responsibility or liability for any damage or personal harm you may suffer resulting from making use of this content.