standard boilerplate: we are random folks on the internet not medical professionals. Looking for medical advice on the internet is a terrible idea in general. See a medical professional for medical advice.
That said, speaking as a random person:
It could be a couple of things off hand.
First thing to try: stop sticking your device in your ear.
After that someone with actual ENT knowledge may be needed. Ears are connected with mouths and noses somehow.