Childhood Diseases

Posted by: Beryl | 2011/05/24


Effect of formula milk on phlegm

Dear Doc

My 2 and a half old daughter has a wet cough - she has phlegm on her chest. I have noticed that her cough is at its worst when I give her milk (she drinks NAN 3). Last night her bedtime bottle caused her to bring up a lot of phlegm. This morning she refused her milk.

She is not allergic to milk.

Is this normal?

Thank you

Expert's Reply



There is a widepread belief in the community that milk causes children to be more phlegmy or produce more mucous with chest infections. Several large studies involving hundreds of children have not been able to prove this or to show any connection between milk and the excessive production of mucous in children.Your child has had a recent chest infection and this is causing her wet cough and also causing her to produce more mucous than usual which she is trying to cough up.Also your little girl is not allergic to milk so hopefully drinking her bottle will not cause any further problems.

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user comments


Posted by: 1fst Mom | 2011/05/24

@Beryl mine is 1yr 3months since last week I realise that if she drinks her milk Nan 3 she cough a lot but yesterday I bought Nido 1 my baby enjoyed it and the whole night she did ''nt cough maybe you can try it .

Reply to 1fst Mom

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