My son is 4 year old his right nostril is hard 2 days before i tought it is because he had runny nose or something when giving bath i used to clean but again it formed as cristal and had oy right nostril i applied oil to sooth it he said it was paining now it became more and right side nostril is fully formed crystal why is this happening.is it normal.he had some kind of infection on his body a week before we used antibiotic and ointment and its gone and now this what to do cleaning it with warm water but it still feel hard