Hello, my kids seems to have Nasal congestion, Runny nose, Sneezing, Eye irritation. Doctor says, its an allergy due to weather change. Its been around a month now, the conditions still persist. I already changed the kids blanket, removed our house carpets, got the curtains changed and also arranged for humidifier, but still the conditions did not change. At times he is perfectly fine, and at times the allergy triggers. He is 3.5 years old. Kindly suggest.