While most people need to work on consuming more fiber, farts that fit this description might be letting you know that you're eating too much of it. “If people eat an excess of fiber, this can begin to cause gas, bloating, cramps, and—paradoxically—constipation,” says Dr. Sonpal. Why's that? Fiber bulks up and solidifies your stool. If you ingest too much, your bowel movements can become hard to pass, he says.