Originally Posted by Mark in Idaho

You could just have a chunk of ear wax that lodged in place. You can get ear oil drops to help these soften. Then, just sleep with that ear down. This is common for people who favor one side when they sleep. The up ear tends to collect wax. I've had ear wax clogs, as recently at last month. My ENT pulled a huge hunk out as he check me out prior to nasal surgery.