My 4.3 years old son (weight 23 kg) has nasal irritation. He is snoring loudly while sleeping, complaining of blocked nose all the time, since three days now. He also has slight cough. When he blows his nose, little white mucus comes out but mostly there is no mucus. The doctor said his chest is clear, but he has some nasal irritation. He is taking beyumont lc kid 2.5 ml, maxtra, nasivion. But still not better. What to do, We also got him nebulised once with levolin and budecort but it did not do anything.