Hello and welcome to Healthcare Magic. Thanks for your query.
is very common in this age group. Most of it is caused due to viral infections and are self-limiting. The important things to ensure are adequate hydration, oral intake and relenishing water and salt losses (you can keep giving him ORS frequently).
Regarding his cough
, since you say that these symptoms are severe, it would be advisable to take him to the hospital for further evaluation and treatment.
Dr. Sheeba Stephen
Emergency Medicine Specialist