Over the last few days, I have had a gradual building pain in the upper right quadrant of my abdomen. It is persistent, dull, and achy. It lessens somewhat at night time. After I eat anything, it becomes moderate stabbing/throbbing pain for a while. It is located under my ribcage. The pain radiates towards my back. It does not change or increase with stretches or other movements and I am certain it isn t a muscle strain. It feels like it s further inside. I have experienced loss of appetite, fatigue, and occasional dizziness, but no nausea or vomiting, and my bowel movements are normal. What could this be?