I have a couple of friends with sleep apnea. They got some kind of device they wear to bed that seems to resolve it. They're really happy being able to sleep well. I haven't heard any complaints about allergies, throat soreness or anything. They're just overjoyed they can get rest and their spouses are happy they aren't snoring.

Sleep Apnea is a serious problem and you really need to get it treated. It can cause anything from accidents from falling asleep to heart problems from having you stop breathing many times in the night. Don't treat it lightly.

And yes, when you get fat you gain weight everywhere, just about. I think sleep apnea is caused by extra tissue obstructing your airways in the upper throat (I think). When you lose weight, you lose it there too.