I've been diving for 15 years and an instructor for 8 of those years. I normally teach at least one open water class a month. I limit my class size to 6 students and normally have a full class. I've noticed in the last year that after teaching a full weekend class of confined water and making certification dives that my ears are very uncomfortable for 2 to 3 days. I've never suffered any ear barotrama in my 15 years of diving. I'm assuming the constant descents and ascents are taking a toll on my ears. I was recently at my physician to have my ears checked out but he could find no issues. I guess my next step is to contact DAN and get a recommendation on an ENT in my local area and get checked out by this ENT which should throughly understand ear issues related to diving. Do other instructors find after time they begin having ear issues?