For the past few days I've had this very slight pressure / very mild if any pain, just below my sternum, at the top of my abdomen. It doesn't hurt, but if I push in on it I do feel a little discomfort. I also feel it when I take a deep breath. I've never had anything like this before, and I'm just curious what the possibilities are. I know it could possibly be ulcers, but that's about all I can come up with. I'm an active 25 year old male with no major health problems. Also, I feel it more when I'm standing that sitting. I haven't noticed any other conditions to go along with this stomach thing. ...just curious.