What causes dull pain below both sides of the ribs in males?

Dull pain below both sides of the ribs in males may be caused by several factors: 1) Strain or injury to the ribs and intercostal muscles—for example, intense exercise, heavy physical labor, or poor posture causing compression—can lead to dull pain beneath the right rib. 2) Costochondritis or intercostal neuralgia, which may cause mild, persistent pain. 3) Liver or gallbladder conditions, such as cholecystitis or gallstones, which can cause pain along with bloating and discomfort. If symptoms do not improve within about a week, seek medical attention promptly and treat the symptoms actively.