Stool getting hung up....On upper left side?

Constipation. If you feel constipated you should speak with your physician. They can prescribe a laxative that will help. There could be something causing it that needs medical intervention. By yourself, you can increase your bulk fiber as long as you drink enough water. Without water, fiber can cause more constipation. There are also over the counter laxatives or stool softeners you can use.