Basically your son may have middle ear infection
or external ear infection according to that history,. Most probably it can be middle ear infection than external.
Pain may associate with ear wax too.
A middle ear infection, also called otitis media
, is a common, often painful, type of ear infection that occurs behind the eardrum. Middle ear infections are caused by bacteria or viruses. A middle ear infection can interfere with the normal process of hearing and result in ear pain
, hearing impairment
and it is more common in young children.
there can be persistent pain for sometime even he is on antibiotic.
But persistent pain, ear discharge
may indicated persistent ear infection. In that case you have to meet a ENT surgeon to get father management.