My son is 10 years old and has been suffering from asthma for the last couple of years. He normally only has asthma in the late spring/ early summer brought on by hayfever, however this year his asthma has been pretty constant and the recent cold weather has aggravated his asthma dramatically. My son's asthma presents itself mainly as a dry irritating cough, he does not have any wheezing generally although can complain of a slightly tight chest. In the morning or during the day his cough is manageable and at times unnoticeable. However over the last couple of weeks his night time cough has been much worse, although once he has fallen asleep he seems fine with only the occasional cough during the night. He is on a preventer and a reliever, takes citerizine as and anti allergy relief and recently has been given a nasal spray as well. Could anyone advise me why his night time cough seems so bad at the moment and give me any tips of ways I can help to relieve it and why does it seem to subside when he is asleep. Most grateful for any suggestions or advice.