Middle ear infection causes Several factors can cause eustachian tubes to get blocked, making it easier for an infection to develop, according to Penn Medicine. They include: "The drainage we look ...

Then, harmful bacteria multiply. External ear infections: The outer ear canal gets infected, causing pain or drainage, ...

Ear infections are much more common in babies and young children than in adults, as their eustachian tubes are much smaller and it’s harder for fluid to drain out. In fact, the National ...