My DS is nearly 5, seems v happy if a bit sensitive at times, teacher says all is well. He still has dummy at night and when upset which I realise is v late and needs dealing with. However, he has started to push it up his nose! He does it absent mindedly but whenever he has got it! His nose is all red and we have taken it away but he can just grab DDs or baby's if desperate! Why might he be doing this? How do I stop it?