Can anxiety and stress be my sole cause of constipation?

Anxiety and GI tract. Yes, anxiety can cause all kinds of gastrointestinal symptoms, including constipation. However, anxiety may not be the sole cause of your constipation. To help reduce constipation drink a lot of water, eat fruits and vegetables and try regular exercise. If constipation continues, get medically checked out to see if there are any other issues or medication recommendations.