My friend is a 43 years old male and is healthy overall. No cholesterol, blood pressure or constipation problems at all. Lately, however he has been experiencing something quite strange. On his left side of the abdomen there are these kinda popping sounds, I mean they are loud. I was talking to him and I was able to hear it, It was like a "POP". Also, he said that it feels like something moves down his intestines, sort of like the sound of a drain being unclogged (that is what he said). Also, he gets bloated and hurts. He is not constipated and goes to the bathroom once a day (I mean to do number two). I am wondering if this is something he should be worried about and consult a doctor?, or if it is something common. Please let me know what do you think it is. Thanks