When allergies attack, the body releases histamines (which is why we take antihistamines to combat our allergies) which cause a number of reactions in the body, particularly the upper respiratory tract: you start to sneeze, the nose and eyes feel itchy, nasal passages get clogged up, eyes get watery and the ears get affected too.
So what does happen to create that strange feeling in the ear when you are having an allergic reaction? (You know the kind that makes your ears pop when you swallow?)
The tubes that are usually in charge of drainage not the middle ear get filled and are clogged with excess fluid. This is fluid that occurs in excess in the nasal canal and airways of the respiratory tract.
Since there is excessive fluid collected in the ear, drainage becomes poor. Due to this, debris collects in the area; and mucus and wax collect. This offers an ideal environment in which viruses and bacteria can multiply, thereby giving rise to ear infection.
It is important to understand how allergies affect the inner and middle ear, particularly in the case of children. This is because ear ache is a difficult thing to explain for children and it is both very painful and very disturbing for them to tolerate.