My son has been sniffing most of the time usually the whole day and he complains that one half of his nose is congested or clogged. He has been snorting a lot since December. What worries me is it could be an allergy but I have been giving his allergy medications but it hasn't worked. He still sniffs. Is this sinusitis? Will antibiotics and decongestants help? Should I start steroid inhalers like Betamethasone or Fluticasone? By the way, he is also asthmatic. If this is an infection, what and how long should the treatment be?