I never thought that digestive issues and anxiety could be linked, so I found this article to be very insightful;
"Two new studies shed light on the link between digestive irritation and anxiety, suggesting that physical digestive problems may cause psychological distress, rather than vice versa as commonly assumed:
Early Gut Problems Linked to Anxiety, Depression
In a study published recently in PLoS ONE, Dr. Pankaj Pasricha of Stanford University School of Medicine and colleagues found that gastric irritation early in life may change the way the brain is wired and raise sensitivity to stress later in life. Their study on newborn rats suggests that some disorders commonly associated with anxiety, such as irritable bowel syndrome, may be the cause rather than the result of conditions like anxiety and depression. According to Dr. Pasricha, “A lot of research has focused on understanding how the mind can influence the body. But this study suggests that it can be the other way around. Gastric irritation during the first few days of life may reset the brain into a permanently depressed state...."
Source: OpposingViews.com
http://www.opposingviews.com/i/could-digestive-problems-cause-anxiety