is when there is a change in the usual pattern of bowel movements, either bowel movement
occurs less often than usual, or because it's difficult or painful to have a bowel movement.
Constipation can happen for many reasons, and is common in pregnant women and the elderly. Ways in which shown you may be affected include you may have regular bowel movements, but it's uncomfortable and you have to strain; or you may not have bowel movements as often as you expect. Constipation is a common reason for people going to see their doctor. Around one in six people have constipation.