My son (3 1/2) has had a habitual cough for the past 3 months since his sister came along....it drives me mad! He does it especially when watching TV or when having a story read to him.
He has also started sticking his fingers in his mouth all at once and pulling them out covered in saliva (yuk) - because his fingers are 'dry'
. I'm not sure if I should be ignoring this or not but I don't feel it's particularly hygienic. I have told him that his fingers are supposed to be dry as he is not a fish but so far it has had little effect!