Hello everyone . I was reading the postings on sleep apnea. I too have this. I have had a sleep study done and use a c-pap machine. Yes I was told it can cause you to gain weight. Ubstructive sleep apnea is when your airway is blocked due to your anatomy.Mine is because the base of my tounge is abnormally wide and my airway is smaller than normal. When I fall asleep my tounge relaxes and cuts off my oxygen supply. It can get really low. This can be dangerous for a number of reasons. I have high blood pressure and if I don't use my machine My blood pressure can go up higher. I also have short term memory loss, headachs' so bad that nothing will make them go away. This is because of the lack of oxygen. Also being very drowsy and this can be dangerous if you are driving or have to operate machinery. Before I found out why I had sleep apnea I kept gaining weight for what seemed to me no reason, I do eat for emotional reasons but I kept telling myself something wasn't right. I was to the point I couldn't hardly function. I would drive home and sit in the driveway in my car and sleep for an hour because I was so tired I just had to close my eyes and sleep before I could go in the house. I also was having back and knee problems,depression anxiety,and not sleeping caused a lot of physcial pain. I finally had to stop working and go on social security. I took an early retirement. Not being able to work really amplyphied everything.  
Fineally after using the c-pap system everynight I can really tell the difference. I have lost 32lbs this past year. That is a start of the 100 lbs I gained when my oldest daughter passed away of terminal brain cancer.There are so many factors that contribute to weight gain,that any one solution so far doesn't seem to exsist. I try to eat as healthy as I can afford to. If I overeat I try to start over. I also go to a weight loss support group called T.O.P.S. Take Off Pounds Sensibly. You can use your own food plan that works for you it is not expensive,people really care ,and there are all over the US and Canada. I would recommend this group to any one who could go. I have made some friends and recieved good support and encouragement. I have worked in Dietary in Nursing Homes and for 18 years in Dietary in a hospital and know how to eat right and yet I still make food a comforting companion a lot of the time. I have over come a lot of obsticals in my time but weight is one that is so hard to conquer. I feel we all need to encourage those of us who struggle with these issues and try to give our self a break and keep keeping on. Because for me to quit could be disasterious.  
So I keep trying each day to do the best I can,and hope I can be good to myself if I eat something someone else thinks because I have a weight problem I don't deserve to eat it!!! I may be over weight right now but some mean spirits are forever. Thanks for having somewhere that some of us can share our thoughts to get and recieve support,understanding and comfort in like minded souls.