Poor little DS (2.5) has got a really sore patch round his lower lip near the crease witht he upper lip. Its quite red. I'm not sure what has caused it. It feels rough so am thinking that its probably dribble (teething & runny nose) in the cold air outside. What do you all suggest I use on it? Have tried Aveeno & E45 but it doesn't really seem to be helping. I had hoped it would have cleaed up by now. Any ideas please?