Our expert says:
Try giving her something to loosen the phlegm like Bisolvon. If she eats well, is not feverish and does not seem to be short of breath, you can give it a while to clear up, but if it persists for longer than 3-4 weeks, rather let your doctor have a look. See http://www.asthmanz.co.nz/files/PDF-files/Resources/Cough_Brochure_050705.pdf
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