Blue tooth. Does it give ear infection?

they don't give infections by themselves. If you put a germy one in your ear, then it might could give you an infection. However, clogging your ear with unsanitary devices raises the risk of the bacteria normally found in the body to get out of whack. The reduced airflow, lets any water in your ear become a breeding pool for bacteria. Painful and gross.

Are you sanitizing it regularly? Is it reducing air flow in your ear? it the volume up too load? lot's of ways to damage your ears- permanently with any kind of earphones.

Is bluetooth an organic device that carries parasitic bacteria?

real smart question Blondie