I am often constipated. i get regular bms too but i am constipated at least on 3 days a week. this has been going on for months now. can my sedentary lifestyle of one year be the cause or is there a risk of cancer?

Constipation due to colon cancer is uncommon and this symptom is only important when you suddenly have a change in bowel habit, not occasional constipated, especially at your age. To answer your question, yes, sedentary life style is a significant risk factor for constipation. You should increase fluid intake 30%, eat foods high in fiber & citric and exercise 3-4 times/week, one hour each session.

: You may take a fiber laxative like Metamucil and drink enough water daily so that your urine is colorless. For the long term you may try to increase your intake of fiber foods. Consult this site for fiber foods. http://www.mayoclinic.org/healthy-lifestyle/nutrition-and-healthy-eating/in-depth/high-fiber-foods/art-20050948 Exercise will help. Wish you good health!