If you have blood in your stool more than spots what would this mean?

I have blood in the toilet after going to the bathroom (in my stool) but it was a lot. What would this mean?

It can mean a very wide variety of things. As my body-health professor would always say, "If you see blood in your shit, go to the doctor immediately." She literally said it about 20 or 30 times a semester. It could be something small like not enough fiber in your diet, to something big like colon cancer. So just go see your doctor.

Do you feel pain in your anus? If so, it could be hemorrhoids. However, you'd better go to see a doctor, as you mentioned 'a lot'.