This is a middle ear infection which is also termed as Otitis Media, which is mainly caused by fluid that accumulates and is trapped behind the bac of the eardrum. As there is blockage, the eardrum bulges and results in earache followed by fullness in the ear and presence of fluid in the ear that is affected. "Otitis Media is an inflammatory condition of the middle cleft, acute or chronic, with collection fluid in the middle ear with an intact tympanic membrane."(Zernotti M.E, Croce J.S , 2017 , Otitis Media with effusion and Atopy, 10(1), pg1-9.