Hello.
Thank you for asking at HCM.
I went through your son's history and I think he is having
respiratory allergic disorder.
I would like to know the age of your son. However, I assume he is pediatric age group.
Personally I would suggest him to continue a drug like
montelukast regularly. If he has nose symptoms like obstruction, running nose, etc, I would suggest to take
levocetirizine and montellukast.
If in spite of being on these medications, he has intermittent cough, I would suggest you to
consult a Pediatrician at time of his symptoms. A Pediatrician will examine his chest and decide what is the cause of coughing.
For identification of
allergy causing substance, allergy testing will be useful. Common allergy causing substances are those in our daily environment like house dust mite, molds, pollens, etc.
Eggs do not create cough unless he is allergic to them.
Hope this will be useful to you.
Wish your son the best of the health.
Regards.