It is a condition of seldom bowel movements which go on for several weeks or longer. Constipation can be chronic and acute. Acute constipation lasts for only a few days and is not serious. Chronic constipation can last for a long time and can affect your daily life. Passing less than three stools a week, hard stools, strained bowel movements, feeling of blockage in rectum, feeling of not completely emptying the stool, needing help to empty rectum etc. are the signs of constipation.