Help needed for 5 year old boy :- Dr Anuj Please

Hello,
My 5 year old son a month ago suffered an ear membrane rupture. He had severe earache with white discharge. He was put on medications. Since then hes suffering from hearing loss.

He is able to hear but only from a short distance . The earache and discharges are no longer present .

He is allergic to artificial food coloring and chocolate. His skin swells up , gets inflamed here n there on the body and he gets blisters , if he ever consumes them.

Last week he ate a candy in school and within an hour his skin puffed up along with the blisters. Also his hearing issue got aggravated.

He strongly prefers sweets and salty food. He suffers from repeated tummy aches specially after 3 am night . Since a month he is bedwetting too. Also his nose is repeatedly blocked and he is suffering from cough n cold repeatedly.

Before the ear issue he was quite healthy but now he has become weak. His appetite has reduced too .

Kindly advise medications specially for his hearing loss as well as his other issues as mentioned above .

Thanks