I had the throat surgery done first a long time ago, my tonsils and adenoids were removed. My wife said it just changed the sound of my snoring. Sleep apnea is caused by your tongue relaxing and blocking off air going to your lungs when you try to fall asleep. So your brain wakes you up hundreds of times in a night so you can breathe. You don't get the restful deep sleep that you need, so you feel exhausted all the time and are prone to drowse off. I wake up alert and have more energy now with the C-Pap.