Anaerobic bacteria, that means the organism doesn't require oxygen to thrive, tend to emit a foul odor that can make earwax smell bad. A bad smell can also mean an infection is causing middle ear damage.

Is ear Wax supposed to smell?

Why Is My Earwax Smelly? Earwax is a normal and an important part of keeping your ears healthy and clean. However, smelly earwax can indicate a problem. If your earwax smells, it may be caused by a medical condition or other complication.

How do you get rid of smelly ears?