DD, 16 months, has had a pretty constant cough since starting at nursery when she was 7 months old - have been backwards and forwards to the GP over the months and each time it's never been a chest infection, just a build up of mucus from having a constant cold. Sometimes though, late at night and first thing in the morning she seems to cough so much that it ends up being a very hoarse-like barky cough. Does anyone know what this is? It doesn't last long and usually once she's up and about it's gone.