Glue ear seems to run in my family. My first child had it causing mild hearing loss for up to six weeks at a time. She grew out of it by age 5.
My youngest has been up & down. Three bouts of mild loss & flat line readings. Then much better. At check Aug check they said only one ear had flat line & hearing in both was within normal spectrum.
Following a cold and one night of mild ear pain in early Nov her heat