Digestive Problems
We use a common phrase, "butterflies in the stomach", when we experience this jittery sensation before a major performance or examination or presentation. This indicates how the intestine is connected to the brain. When a person is anxious or stressed, there is a typical sensation in the abdomen which leaves the person feeling very uncomfortable. Pain, gas, diarrhea, irritable bowel syndrome and reflux tend to get exaggerated due to stress.