Community medical question

For the past few days, I have been experiencing noticeable discomfort in my upper abdomen. The main issue is swelling in the upper abdominal area, which becomes more obvious when I sit, bend, or lie down. Along with the swelling, I feel a constant tightness in the abdominal muscles, as if the muscles are stiff or strained. This tightness sometimes increases after eating or when I try to move or stretch.

I also have pain in the same area, which varies in intensity. At times it feels like a dull, heavy ache, and sometimes it becomes sharp, especially when I press on the area or change positions. The discomfort is affecting my daily activities, and I feel uneasy most of the time.

I am concerned about the cause of the swelling and muscle tightness and would like a proper evaluation and guidance for treatment.