My child has been diagnosed with childhood asthma and it's really worrying me. He wheezes constantly and the treatment doesn't seem to be helping. It seems to get worse in the evenings, but the wheeze is always there no matter what. I use a nebuliser with Asthavent but it doesn't seem to ease the wheezing at all. The strange thing is, when he lies down, the wheezing disappears. He's even been hospitalized for respiratory distress before. What can I do or try next? I'm really concerned about his condition.