Otitis media is when fluid accumulates behind the eardrum due to poor ventilation of the middle ear. There are 2 types of otitis media. The first is serous otitis, which is often called silent otitis due to the absence of symptoms most of the time. Uninfected fluid collects behind the eardrum. The second is acute otitis media. Infected fluid builds up, causing inflammation or pressure on the eardrum. If the pressure becomes very strong, the eardrum may rupture and fluid will leak from the ear. Generally, the presence of otitis media causes mild hearing loss that is temporary. The audiologist is the professional who will quantify the hearing loss associated with the presence of fluid (otitis). Some ear infections will go away on their own, while others require medical attention.
Otitis media: https://naitreetgrandir.com/fr/sante/naitre-grandir-sante-enfant-mal-oreille-otite/