Many people have a life-long tendencytoward constipation while others tend to have occasional constipationalternating with a normal bowel pattern or even diarrhea. While mild andintermittent constipation in these individuals is usually not a cause forconcern, a doctor should be consulted under the following circumstances:四川省第四人民医院消化内科常玉英
A new onset of constipation or recentchange in bowel habits
Moderate to severe constipation, orconstipation that does not respond to self-treatment with simple bulking agentsthat provide fiber
Constipation that is accompanied by rectalbleeding, abdominal pain and cramps, nausea and vomiting, or involuntary weightloss
Constipation during pregnancy or whilebreastfeeding.