Colon cancer at 15?

[Paryeona8]

I've had a bit of diarrhea the past week (usually after eating too much sugar) and today I've noticed my regular stool is looking a bit thinner than usual and it also had red in it. This is the first time I've noticed redness (I'm not sure if this could be from the homemade spaghetti sauce my dad made or not though). As the stool passes a certain part of my intestine I can feel it at a certain place near my hip on the left which I'm thinking might be from a tumour. I also have symptoms of an anal fissure but there was no blood on the toilet paper. The only case of colon cancer in my family before 60 is my great aunt who died from colon cancer at 46. I'm really scared I have cancer even though I'm so young but I'm too embarrassed and nervous to tell my parents. Does this sound serious?

You must tell your parents so they can help you go through this problem together.  If colon cancer run in the family you should be checked out real early in life. Go to your family doctor and asked him if you need a MRI.