My stool is usually flat. i have no other symptoms other than flatter stool. sometimes it's normal but most of the time is flat. should i be worried?

Flat stool: Flat stools are not unusual and may occur in irritable bowel syndrome or spastic colitis. Since you also have normal shaped stools at times, a constricting lesion, like cancer or scarring of your descending colon is unlikely. However,see your physician for evaluation if this is a definite change in your usual bowel pattern and appropriate testing will be done.