My daughter is 16 years old and has gained about 30 pounds in the past 4 months. My husband and I are both very thin and all 3 of us are on the same diet. I just thought that my daughter was sneaking food--but that would be a lot of calories to consume to gain that much weight, right? Also, since January, she has been coming home from school and taking 2 to 2 1/2 hour naps. She is tired all the time now and has developed dark circles under her eyes. When she and I were shopping yesterday, I noticed that when she removed her boots, her ankles were swollen; which led me to take a closer look at her and I have found that she is swollen in her feet, legs, ankles, hands, and face. She and I exercise each evening, and although I have no problem maintaining my weight, she just seems to be getting larger. Is this indeed a weight problem with her, or could it be swelling? If it's swelling, what could be causing this?