my 18mth baby has had dirreah for 11 dys

Hi, could really have done with a little more info but ultimately any child who has been unwell for this length of time should have seen a doctor already. with diarrhoea or vomitting they stand a very high chance of becoming dangerously dehydrated or if nothing else the lack of absorption of nutrients can have a significant negative effect on their development. if there is any underlying cause or other info you can provide then please respond and i will be happy to advise, but otherwise seek medical assistance as soon as possible.