Why does a perforated eardrum increase the the risk of ear infections?

A perforated eardrum creates an opening in the barrier that protects the middle ear from bacteria and other pathogens. This disruption allows germs from the outer ear or the surrounding environment to enter the middle ear more easily, increasing the likelihood of infections. Additionally, the perforation can impair the normal functioning of the Eustachian tube, which helps regulate pressure and drainage, further contributing to the risk of ear infections.