With an ear infection, the eardrum becomes red and the patient experience ear pain. Eventually, pus develops behind the eardrum which results in a significant increase in pain due to the pressure. As the infection resolves, the pus and inflammation decreases resulting in the disappearance of pain. However, fluid is left behind as well
as negative pressure. At this point, the patient suffers from hearing loss and as well as a
clogged, muffled sensation. The body over time will either absorb the
fluid or the fluid will more quickly drain out through the eustachian tube resolving
any hearing loss. However, negative pressure may persist causing a continued clogged sensation in the ear until the patient is able to pop the ear.