What do you suggest if i have constipation issue even though i've been watching my diet & drink plenty of water?

Try fiber: Add a fiber supplement to your diet and perhaps a stool softener. If you have not had a colonoscopy you should have one just because you are 50 and to make sure there is no anatomic reason for the constipation.

Chronic Constipation: Increase fluids, fiber and activities. May need a stool softener. Consider screening colonoscopy if none.