Hi. Today i woke up this morning, i felt pulsating dull type pain in my right lower abdomen, i am 28 yrs old man. Two hours passed still the same, it goes and comes every 10 secons, pulsating. No nausea and vomiting. No fever. Had bowel movment, stools are normal. I checked myself no rebound tenderness. Appetite is normal. What could be the cause?