Thanks for posting you query to health care magic. asthama is usually allergic in nature and it is better to avoid expouser to allergen.sometimes viral infection produces asthma like illness and in su ch case patient get cured after over of viral attack .so you need not be worry as violent cough usually produces pain in the chest and pain disappeared few days after relief of cough. But you need to take some treatment for faster recovery of your chld it should include expectorant and brochodialator syrup, multamin syrup and antibiotic if required . you need to consult paediatrician for complete treatment . Hope you would be satisfied with my answer . Feel free to communicate if any query . regards, Dr.Manish Purohit Infectious disease specialist