I am a 22 year old girl weighing 40 kg, I eat a lot but nothing seems to help me gain weight. My eating habits are also normal. Not including too much junk. I also sleep a lot, and since the past 2 months am having persistent acne. Although I dont have any difficulty in day to day work. And can do as much work as any girl my age this excess sleep is a bit worrying. Please suggest if these could be symptoms to some underlying health issue.