My son having allergies but don't know why it happens. Continue sneezing running nose .Some time his eyes also having water. It may happen any time during day or night. I have consulted air force medical hospital, they told the weather of this area is allergetic and it will remain untill I will stay here. I am staying in this area since last five years and this problem is coming last 6 mothhs. They gives Cetrazine and told when he have allergies give him.