Hi Dr. Tony, I've been wearing a sleep apnea oral appliance for approximately 2 weeks. I have ringing in my ears that seems to have gotten worse since I started using the appliance and, also, I don't feel very rested. I have a thick tongue, seasonal allergies, chronic sinusitis, and mild sleep apnea related TMJ too. It's springtime so some of this is related to my allergies but could I be clenching with the oral appliance during the night thus causing the ringing in my ears? I had terribly plugged ears with lots of ringing when I was not using my CPAP machine prior to my using the oral appliance. I see my dentist again in 2 weeks. Please give me your opinion. Many thanks!!