I just turned 21 in November. As of late my stools are thinner then normal. Not exactly pencil thin but pretty close. Always had problems with Constipation for the longest time. But the last two days I’ve been having minuscule bowl movements but more frequently. Saturday four times and Sunday twice but usually only once a day. Is this a sign of colon cancer? I know most people say over 50 is when colon cancer occurs but is it possible at 21? Admit tingly my diet is horrible when if comes to fiber. Could that be causing this?