What causes incomplete bowel movement? my morning poop is always only 90 percent evacuated. any otc things i can do?

Incomplete: First have a rectal examination to rule out any mechanical disorders or rectal growths. If none, try inserting a rectal glycerin suppository prior to your BM. If no help, insert a dulcolax suppository. You could administer a fleets enema if necessary. A proctologist can instruct you on exercises to strengthen your anorectal musculature.