Constipation may be defined as the retention of faeces in colon beyond the normal time of empting time. People who are constipated find it painful to have a bowel movement and often experience straining, bloating and the sensation of a full bowel. Constipation is a symptom, not a disease. Almost everyone experiences constipation at some point in their life, and a poor diet typically is the cause. Most constipation is temporary and not serious.