Thanks for your question on Healthcare Magic.
I can understand your concern.
Your husband is having chronic cough
Most common cause for chronic cough is allergic asthma
and lung infection
Since he is having family history (mother) positive for similar complaints, possibility of allergic asthma is more likely.
So better to take him to pulmonologist and get done clinical examination of respiratory system and PFT (Pulmonary Function Test).
PFT will not only diagnose asthma but it will also tell you about severity of the disease and treatment is based on severity only.
He will mostly improve with inhaled bronchodilators (formoterol or salmeterol) and inhaled corticosteroid (ICS) (budesonide or fluticasone).. Oral combination of antihistamine (levocetrizine or fexofenadine
) and anti allergic (montelukast) once a day at night is also beneficial.
Don't worry, he will be alright.
Hope I have solved your query. I will be happy to help you further. Wishing good health to your husband. Thanks.