Can a 17 year old get colon cancer because i'm scared to death and i am showing symptoms. such as constipation and change of bowel movements i go less?

Colon cancer: In 17 year old is very rare, unless there are predisposing factors such as familial polyposis or ulcerative colitis. If you are 41, it is another story, because there is a higher risk. You need a medical evaluation to check for colon cancer if you are having these symptoms at age 41.

Possible but...: Very rare. Child with familial adenomatous polyposis is at higher risk.

Colon ca: although it can happen, but it's unlikely that constipation and change in BM in a 17 year old person is caused by cancer. other things like infections,or inflammatory bowel disease (IBD) , celiac disease or irritable bowel syndrome are more likely to be the case than cancer. colon cancer can happen in 30-40 yr old especially if FAP present or long standing IBD,celiac dz.. d/w your MD in detail