Hello,

Thanks for posting on XXXXXXX

From your description of your son's condition that looks to me like an asthmatic attack. Also required to rule out acute bronchitis ( probably due to virus and provoked by cold).
Cold weather and infection are good triggers of asthma even to people with no family history or previous asthma attacks. If there is any family history of asthma, then the cause for his worry is asthma and that is the reason why everything was checked to be normal.
My advice is for him to get ventoline spray in case he gets another attack to relief him from the attack if he goes through one again.

Hope this helps
Dr Nsah

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Thanks for updating

Most often, asthma is usually triggered by certain factors such as emotional stress, cold, infection and just to name a few. If he had asthma since he was 2 and never had any episode then it simply means that the condition (s) that could have triggered the asthma never existed (or rather were not put together to trigger the crisis) or he simply resisted to having another episode (by body's autodefense mechanisms). Acute bronchitis is another cause for concern ( he might have picked an airborne virus from another person) which could have provoked this problem.
Asthmatic could remain inert for several years and only start recurring after a length time. Maybe you should try to find out from your son if he was recently emotional stress especially a few hours before the attack or had an infection.
Cold is the most likely culprit especially dry cold.

Hope this helps
Dr Nsah

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