Son Hai Hai, My Son Is 3 Years Old, In August, He Got A Fever And It Took Nearly 12 Days To Cure, But He Did Not Have?

Hai, My son is 3 years old, in August, he got a fever and it took nearly 12 days to cure, but he did not have? - son hai

He does not eat properly, ie, for every day eating a chapathi besides drinking milk about 30 ml Thatta Why is this happening only to him. Now it was cold, which is not running, so something is on the back of the nose and cough and cough taken in his sleep five to six times per day